16787117025 has 144 divisors (see below), whose sum is σ = 37762910400. Its totient is φ = 7269937920.

The previous prime is 16787117023. The next prime is 16787117047. The reversal of 16787117025 is 52071178761.

It is not a de Polignac number, because 16787117025 - 2¹ = 16787117023 is a prime.

It is a super-2 number, since 2×16787117025² (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 (16787117023) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 615069 + ... + 641781.

Almost surely, 2^16787117025 is an apocalyptic number.

16787117025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16787117025 is an abundant number, since it is smaller than the sum of its proper divisors (20975793375).

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

16787117025 is a wasteful number, since it uses less digits than its factorization.

16787117025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26765 (or 26747 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 45.

The spelling of 16787117025 in words is "sixteen billion, seven hundred eighty-seven million, one hundred seventeen thousand, twenty-five".