61757509328 has 20 divisors (see below), whose sum is σ = 120447597408. Its totient is φ = 30674258400.

The previous prime is 61757509309. The next prime is 61757509343. The reversal of 61757509328 is 82390575716.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61757509328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12778526 + ... + 12783357.

Almost surely, 2^61757509328 is an apocalyptic number.

It is an amenable number.

61757509328 is a deficient number, since it is larger than the sum of its proper divisors (58690088080).

61757509328 is a wasteful number, since it uses less digits than its factorization.

61757509328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25562042 (or 25562036 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 61757509328 in words is "sixty-one billion, seven hundred fifty-seven million, five hundred nine thousand, three hundred twenty-eight".