61857922560 has 160 divisors (see below), whose sum is σ = 226002534912. Its totient is φ = 14138941440.

The previous prime is 61857922547. The next prime is 61857922573. The reversal of 61857922560 is 6522975816.

It is an interprime number because it is at equal distance from previous prime (61857922547) and next prime (61857922573).

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521556 + ... + 629075.

Almost surely, 2^61857922560 is an apocalyptic number.

61857922560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61857922560 is an abundant number, since it is smaller than the sum of its proper divisors (164144612352).

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

61857922560 is a wasteful number, since it uses less digits than its factorization.

61857922560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150664 (or 1150648 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 61857922560 in words is "sixty-one billion, eight hundred fifty-seven million, nine hundred twenty-two thousand, five hundred sixty".