3897655165504 has 21 divisors (see below), whose sum is σ = 7734440810361. Its totient is φ = 1948819685760.

The previous prime is 3897655165499. The next prime is 3897655165549. The reversal of 3897655165504 is 4055615567983.

It is a happy number.

The square root of 3897655165504 is 1974248.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1950625635904 + 1947029529600 = 1396648^2 + 1395360^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15670594 + ... + 15917374.

Almost surely, 2^{3897655165504} is an apocalyptic number.

3897655165504 is the 1974248-th square number.

It is an amenable number.

3897655165504 is a deficient number, since it is larger than the sum of its proper divisors (3836785644857).

3897655165504 is an frugal number, since it uses more digits than its factorization.

3897655165504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493574 (or 246783 counting only the distinct ones).

The product of its (nonzero) digits is 136080000, while the sum is 64.

Multiplying 3897655165504 by its sum of digits (64), we get a square (249449930592256 = 15793984²).

3897655165504 divided by its sum of digits (64) gives a square (60900861961 = 246781²).

The spelling of 3897655165504 in words is "three trillion, eight hundred ninety-seven billion, six hundred fifty-five million, one hundred sixty-five thousand, five hundred four".