61516500 has 48 divisors (see below), whose sum is σ = 179140416. Its totient is φ = 16404000.

The previous prime is 61516447. The next prime is 61516501. The reversal of 61516500 is 561516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61516501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19006 + ... + 22005.

It is an arithmetic number, because the mean of its divisors is an integer number (3732092).

Almost surely, 2^61516500 is an apocalyptic number.

61516500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61516500 is an abundant number, since it is smaller than the sum of its proper divisors (117623916).

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

61516500 is a wasteful number, since it uses less digits than its factorization.

61516500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41033 (or 41021 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 61516500 is about 7843.2455017040. The cubic root of 61516500 is about 394.7576358637.

The spelling of 61516500 in words is "sixty-one million, five hundred sixteen thousand, five hundred".