61527976961 has 8 divisors (see below), whose sum is σ = 67124175744. Its totient is φ = 55932235920.

The previous prime is 61527976957. The next prime is 61527976987. The reversal of 61527976961 is 16967972516.

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

It is not a de Polignac number, because 61527976961 - 2² = 61527976957 is a prime.

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 61527976961.

It is not an unprimeable number, because it can be changed into a prime (61527976921) 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, 205535 + ... + 406571.

It is an arithmetic number, because the mean of its divisors is an integer number (8390521968).

Almost surely, 2^61527976961 is an apocalyptic number.

It is an amenable number.

61527976961 is a deficient number, since it is larger than the sum of its proper divisors (5596198783).

61527976961 is a wasteful number, since it uses less digits than its factorization.

61527976961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228871.

The product of its digits is 8573040, while the sum is 59.

The spelling of 61527976961 in words is "sixty-one billion, five hundred twenty-seven million, nine hundred seventy-six thousand, nine hundred sixty-one".