61320624540 has 96 divisors (see below), whose sum is σ = 199442901504. Its totient is φ = 13786364160.

The previous prime is 61320624433. The next prime is 61320624551. The reversal of 61320624540 is 4542602316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1171114 + ... + 1222353.

It is an arithmetic number, because the mean of its divisors is an integer number (2077530224).

Almost surely, 2^61320624540 is an apocalyptic number.

61320624540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61320624540 is an abundant number, since it is smaller than the sum of its proper divisors (138122276964).

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

61320624540 is a wasteful number, since it uses less digits than its factorization.

61320624540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393547 (or 2393545 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 61320624540 in words is "sixty-one billion, three hundred twenty million, six hundred twenty-four thousand, five hundred forty".