61257557364 has 48 divisors (see below), whose sum is σ = 143391360000. Its totient is φ = 20353993056.

The previous prime is 61257557353. The next prime is 61257557453. The reversal of 61257557364 is 46375575216.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5425477 + ... + 5436755.

It is an arithmetic number, because the mean of its divisors is an integer number (2987320000).

Almost surely, 2^61257557364 is an apocalyptic number.

It is an amenable number.

61257557364 is an abundant number, since it is smaller than the sum of its proper divisors (82133802636).

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

61257557364 is a wasteful number, since it uses less digits than its factorization.

61257557364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12692 (or 12690 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 51.

The spelling of 61257557364 in words is "sixty-one billion, two hundred fifty-seven million, five hundred fifty-seven thousand, three hundred sixty-four".