16078937681 has 32 divisors (see below), whose sum is σ = 17265954816. Its totient is φ = 14941080000.

The previous prime is 16078937629. The next prime is 16078937687. The reversal of 16078937681 is 18673987061.

It is a cyclic number.

It is not a de Polignac number, because 16078937681 - 2³⁰ = 15005195857 is a prime.

It is a super-2 number, since 2×16078937681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16078937687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48576686 + ... + 48577016.

It is an arithmetic number, because the mean of its divisors is an integer number (539561088).

Almost surely, 2^16078937681 is an apocalyptic number.

It is an amenable number.

16078937681 is a deficient number, since it is larger than the sum of its proper divisors (1187017135).

16078937681 is a wasteful number, since it uses less digits than its factorization.

16078937681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 16078937681 in words is "sixteen billion, seventy-eight million, nine hundred thirty-seven thousand, six hundred eighty-one".