16491152025 has 36 divisors (see below), whose sum is σ = 30165962112. Its totient is φ = 8608141920.

The previous prime is 16491151993. The next prime is 16491152047. The reversal of 16491152025 is 52025119461.

16491152025 is a `hidden beast` number, since 1 + 649 + 1 + 1 + 5 + 2 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 16491152025 - 2⁵ = 16491151993 is a prime.

It is a super-2 number, since 2×16491152025² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 769149 + ... + 790298.

It is an arithmetic number, because the mean of its divisors is an integer number (837943392).

Almost surely, 2^16491152025 is an apocalyptic number.

16491152025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16491152025 is a deficient number, since it is larger than the sum of its proper divisors (13674810087).

16491152025 is a wasteful number, since it uses less digits than its factorization.

16491152025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559510 (or 1559502 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 16491152025 in words is "sixteen billion, four hundred ninety-one million, one hundred fifty-two thousand, twenty-five".