61657496511 has 8 divisors (see below), whose sum is σ = 88533841200. Its totient is φ = 37943074752.

The previous prime is 61657496507. The next prime is 61657496521. The reversal of 61657496511 is 11569475616.

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

It is not a de Polignac number, because 61657496511 - 2² = 61657496507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61657496521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790480686 + ... + 790480763.

It is an arithmetic number, because the mean of its divisors is an integer number (11066730150).

Almost surely, 2^61657496511 is an apocalyptic number.

61657496511 is a deficient number, since it is larger than the sum of its proper divisors (26876344689).

61657496511 is a wasteful number, since it uses less digits than its factorization.

61657496511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580961465.

The product of its digits is 1360800, while the sum is 51.

The spelling of 61657496511 in words is "sixty-one billion, six hundred fifty-seven million, four hundred ninety-six thousand, five hundred eleven".