61887246520 has 32 divisors (see below), whose sum is σ = 151905060720. Its totient is φ = 22504453120.

The previous prime is 61887246503. The next prime is 61887246581. The reversal of 61887246520 is 2564278816.

It is a super-2 number, since 2×61887246520² (a number of 22 digits) contains 22 as substring.

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, 70325977 + ... + 70326856.

Almost surely, 2^61887246520 is an apocalyptic number.

It is an amenable number.

61887246520 is an abundant number, since it is smaller than the sum of its proper divisors (90017814200).

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

61887246520 is a wasteful number, since it uses less digits than its factorization.

61887246520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140652855 (or 140652851 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 61887246520 in words is "sixty-one billion, eight hundred eighty-seven million, two hundred forty-six thousand, five hundred twenty".