16377665025 has 24 divisors (see below), whose sum is σ = 27951218944. Its totient is φ = 8452987200.

The previous prime is 16377665021. The next prime is 16377665053. The reversal of 16377665025 is 52056677361.

It is not a de Polignac number, because 16377665025 - 2² = 16377665021 is a prime.

It is a super-2 number, since 2×16377665025² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16377665021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3519754 + ... + 3524403.

Almost surely, 2^16377665025 is an apocalyptic number.

16377665025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16377665025 is a deficient number, since it is larger than the sum of its proper divisors (11573553919).

16377665025 is a wasteful number, since it uses less digits than its factorization.

16377665025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044201 (or 7044196 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 16377665025 in words is "sixteen billion, three hundred seventy-seven million, six hundred sixty-five thousand, twenty-five".