6925721897856 has 32 divisors (see below), whose sum is σ = 18396448792200. Its totient is φ = 2308573965824.

The previous prime is 6925721897837. The next prime is 6925721897911. The reversal of 6925721897856 is 6587981275296.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×6925721897856² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9017866671 + ... + 9017867438.

Almost surely, 2^{6925721897856} is an apocalyptic number.

It is an amenable number.

6925721897856 is an abundant number, since it is smaller than the sum of its proper divisors (11470726894344).

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

6925721897856 is a wasteful number, since it uses less digits than its factorization.

6925721897856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18035734126 (or 18035734114 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 75.

The spelling of 6925721897856 in words is "six trillion, nine hundred twenty-five billion, seven hundred twenty-one million, eight hundred ninety-seven thousand, eight hundred fifty-six".