61294347537 has 8 divisors (see below), whose sum is σ = 81961319136. Its totient is φ = 40745137152.

The previous prime is 61294347533. The next prime is 61294347577. The reversal of 61294347537 is 73574349216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61294347537 - 2² = 61294347533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61294347537.

It is not an unprimeable number, because it can be changed into a prime (61294347533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29439088 + ... + 29441169.

It is an arithmetic number, because the mean of its divisors is an integer number (10245164892).

Almost surely, 2^61294347537 is an apocalyptic number.

It is an amenable number.

61294347537 is a deficient number, since it is larger than the sum of its proper divisors (20666971599).

61294347537 is a wasteful number, since it uses less digits than its factorization.

61294347537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58880607.

The product of its digits is 3810240, while the sum is 51.

The spelling of 61294347537 in words is "sixty-one billion, two hundred ninety-four million, three hundred forty-seven thousand, five hundred thirty-seven".