61957616425 has 12 divisors (see below), whose sum is σ = 77020976716. Its totient is φ = 49441233600.

The previous prime is 61957616419. The next prime is 61957616527. The reversal of 61957616425 is 52461675916.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 14868736 + 61942747689 = 3856^2 + 248883^2 .

It is not a de Polignac number, because 61957616425 - 2³ = 61957616417 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3111366 + ... + 3131215.

Almost surely, 2^61957616425 is an apocalyptic number.

It is an amenable number.

61957616425 is a deficient number, since it is larger than the sum of its proper divisors (15063360291).

61957616425 is a wasteful number, since it uses less digits than its factorization.

61957616425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6242988 (or 6242983 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 52.

The spelling of 61957616425 in words is "sixty-one billion, nine hundred fifty-seven million, six hundred sixteen thousand, four hundred twenty-five".