61225126385 has 12 divisors (see below), whose sum is σ = 73546050612. Its totient is φ = 48929530848.

The previous prime is 61225126373. The next prime is 61225126423. The reversal of 61225126385 is 58362152216.

It can be written as a sum of positive squares in 2 ways, for example, as 44909662561 + 16315463824 = 211919^2 + 127732^2 .

It is not a de Polignac number, because 61225126385 - 2⁸ = 61225126129 is a prime.

It is a super-2 number, since 2×61225126385² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21088844 + ... + 21091746.

It is an arithmetic number, because the mean of its divisors is an integer number (6128837551).

Almost surely, 2^61225126385 is an apocalyptic number.

It is an amenable number.

61225126385 is a deficient number, since it is larger than the sum of its proper divisors (12320924227).

61225126385 is an frugal number, since it uses more digits than its factorization.

61225126385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7264 (or 4361 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The spelling of 61225126385 in words is "sixty-one billion, two hundred twenty-five million, one hundred twenty-six thousand, three hundred eighty-five".