1897625656164 has 48 divisors (see below), whose sum is σ = 5223571705856. Its totient is φ = 524689120800.

The previous prime is 1897625656163. The next prime is 1897625656207. The reversal of 1897625656164 is 4616565267981.

It is a junction number, because it is equal to n+sod(n) for n = 1897625656095 and 1897625656104.

It is not an unprimeable number, because it can be changed into a prime (1897625656163) 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 15 ways as a sum of consecutive naturals, for example, 364364842 + ... + 364370049.

Almost surely, 2^{1897625656164} is an apocalyptic number.

1897625656164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1897625656164 is an abundant number, since it is smaller than the sum of its proper divisors (3325946049692).

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

1897625656164 is a wasteful number, since it uses less digits than its factorization.

1897625656164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728734936 (or 728734934 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 66.

The spelling of 1897625656164 in words is "one trillion, eight hundred ninety-seven billion, six hundred twenty-five million, six hundred fifty-six thousand, one hundred sixty-four".