61512937800 has 48 divisors (see below), whose sum is σ = 190690109040. Its totient is φ = 16403449920.

The previous prime is 61512937789. The next prime is 61512937879. The reversal of 61512937800 is 873921516.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51260182 + ... + 51261381.

It is an arithmetic number, because the mean of its divisors is an integer number (3972710605).

Almost surely, 2^61512937800 is an apocalyptic number.

61512937800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61512937800 is an abundant number, since it is smaller than the sum of its proper divisors (129177171240).

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

61512937800 is a wasteful number, since it uses less digits than its factorization.

61512937800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102521582 (or 102521573 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

It can be divided in two parts, 6151 and 2937800, that added together give a triangular number (2943951 = T₂₄₂₆).

The spelling of 61512937800 in words is "sixty-one billion, five hundred twelve million, nine hundred thirty-seven thousand, eight hundred".