61651755715616 has 96 divisors (see below), whose sum is σ = 132600566669760. Its totient is φ = 27983452364800.

The previous prime is 61651755715577. The next prime is 61651755715619.

61651755715616 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (61651755715619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1711722440 + ... + 1711758456.

It is an arithmetic number, because the mean of its divisors is an integer number (1381255902810).

Almost surely, 2^{61651755715616} is an apocalyptic number.

It is an amenable number.

61651755715616 is an abundant number, since it is smaller than the sum of its proper divisors (70948810954144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61651755715616 is a wasteful number, since it uses less digits than its factorization.

61651755715616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42858 (or 42850 counting only the distinct ones).

The product of its digits is 39690000, while the sum is 62.

The spelling of 61651755715616 in words is "sixty-one trillion, six hundred fifty-one billion, seven hundred fifty-five million, seven hundred fifteen thousand, six hundred sixteen".