61715542620 has 24 divisors (see below), whose sum is σ = 172803519504. Its totient is φ = 16457478016.

The previous prime is 61715542591. The next prime is 61715542709. The reversal of 61715542620 is 2624551716.

61715542620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514296129 + ... + 514296248.

It is an arithmetic number, because the mean of its divisors is an integer number (7200146646).

Almost surely, 2^61715542620 is an apocalyptic number.

61715542620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61715542620 is an abundant number, since it is smaller than the sum of its proper divisors (111087976884).

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

61715542620 is a wasteful number, since it uses less digits than its factorization.

61715542620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028592389 (or 1028592387 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 61715542620 in words is "sixty-one billion, seven hundred fifteen million, five hundred forty-two thousand, six hundred twenty".