16164655425 has 72 divisors (see below), whose sum is σ = 29180656128. Its totient is φ = 8553600000.

The previous prime is 16164655421. The next prime is 16164655453. The reversal of 16164655425 is 52455646161.

16164655425 is a `hidden beast` number, since 1 + 6 + 164 + 65 + 5 + 425 = 666.

It is not a de Polignac number, because 16164655425 - 2² = 16164655421 is a prime.

It is a super-2 number, since 2×16164655425² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (16164655421) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 21523800 + ... + 21524550.

Almost surely, 2^16164655425 is an apocalyptic number.

16164655425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16164655425 is a deficient number, since it is larger than the sum of its proper divisors (13016000703).

16164655425 is a wasteful number, since it uses less digits than its factorization.

16164655425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1383 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 16164655425 in words is "sixteen billion, one hundred sixty-four million, six hundred fifty-five thousand, four hundred twenty-five".