61503515400 has 96 divisors (see below), whose sum is σ = 190748728800. Its totient is φ = 16393382400.

The previous prime is 61503515383. The next prime is 61503515417. The reversal of 61503515400 is 451530516.

It is an interprime number because it is at equal distance from previous prime (61503515383) and next prime (61503515417).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1346131 + ... + 1391069.

It is an arithmetic number, because the mean of its divisors is an integer number (1986965925).

Almost surely, 2^61503515400 is an apocalyptic number.

61503515400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61503515400 is an abundant number, since it is smaller than the sum of its proper divisors (129245213400).

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

61503515400 is a wasteful number, since it uses less digits than its factorization.

61503515400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47239 (or 47230 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 61503515400 in words is "sixty-one billion, five hundred three million, five hundred fifteen thousand, four hundred".