61122020425 has 6 divisors (see below), whose sum is σ = 75791305358. Its totient is φ = 48897616320.

The previous prime is 61122020383. The next prime is 61122020437. The reversal of 61122020425 is 52402022116.

It can be written as a sum of positive squares in 3 ways, for example, as 15106622281 + 46015398144 = 122909^2 + 214512^2 .

It is not a de Polignac number, because 61122020425 - 2⁹ = 61122019913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 2444880817 = 61122020425 / (6 + 1 + 1 + 2 + 2 + 0 + 2 + 0 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61122020425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222440384 + ... + 1222440433.

Almost surely, 2^61122020425 is an apocalyptic number.

It is an amenable number.

61122020425 is a deficient number, since it is larger than the sum of its proper divisors (14669284933).

61122020425 is a wasteful number, since it uses less digits than its factorization.

61122020425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444880827 (or 2444880822 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 61122020425 in words is "sixty-one billion, one hundred twenty-two million, twenty thousand, four hundred twenty-five".