61630762520 has 16 divisors (see below), whose sum is σ = 138669215760. Its totient is φ = 24652304992.

The previous prime is 61630762519. The next prime is 61630762547. The reversal of 61630762520 is 2526703616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770384492 + ... + 770384571.

It is an arithmetic number, because the mean of its divisors is an integer number (8666825985).

Almost surely, 2^61630762520 is an apocalyptic number.

It is an amenable number.

61630762520 is an abundant number, since it is smaller than the sum of its proper divisors (77038453240).

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

61630762520 is a wasteful number, since it uses less digits than its factorization.

61630762520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540769074 (or 1540769070 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 61630762520 in words is "sixty-one billion, six hundred thirty million, seven hundred sixty-two thousand, five hundred twenty".