61550724352 has 72 divisors (see below), whose sum is σ = 139275788960. Its totient is φ = 26912839680.

The previous prime is 61550724349. The next prime is 61550724379. The reversal of 61550724352 is 25342705516.

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, 423474 + ... + 549937.

Almost surely, 2^61550724352 is an apocalyptic number.

It is an amenable number.

61550724352 is an abundant number, since it is smaller than the sum of its proper divisors (77725064608).

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

61550724352 is a wasteful number, since it uses less digits than its factorization.

61550724352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973459 (or 973445 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 61550724352 in words is "sixty-one billion, five hundred fifty million, seven hundred twenty-four thousand, three hundred fifty-two".