16721525410 has 32 divisors (see below), whose sum is σ = 30596868720. Its totient is φ = 6578813952.

The previous prime is 16721525399. The next prime is 16721525449. The reversal of 16721525410 is 1452512761.

It can be written as a sum of positive squares in 8 ways, for example, as 3824061921 + 12897463489 = 61839^2 + 113567^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93342 + ... + 205318.

Almost surely, 2^16721525410 is an apocalyptic number.

16721525410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16721525410 is a deficient number, since it is larger than the sum of its proper divisors (13875343310).

16721525410 is a wasteful number, since it uses less digits than its factorization.

16721525410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112230.

The product of its (nonzero) digits is 16800, while the sum is 34.

The spelling of 16721525410 in words is "sixteen billion, seven hundred twenty-one million, five hundred twenty-five thousand, four hundred ten".