61865256415380 has 48 divisors (see below), whose sum is σ = 188970237779904. Its totient is φ = 14997637918720.

The previous prime is 61865256415367. The next prime is 61865256415409. The reversal of 61865256415380 is 8351465256816.

It is a Harshad number since it is a multiple of its sum of digits (60).

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, 46867617837 + ... + 46867619156.

It is an arithmetic number, because the mean of its divisors is an integer number (3936879953748).

Almost surely, 2^{61865256415380} is an apocalyptic number.

61865256415380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61865256415380 is an abundant number, since it is smaller than the sum of its proper divisors (127104981364524).

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

61865256415380 is a wasteful number, since it uses less digits than its factorization.

61865256415380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93735237016 (or 93735237014 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 60.

The spelling of 61865256415380 in words is "sixty-one trillion, eight hundred sixty-five billion, two hundred fifty-six million, four hundred fifteen thousand, three hundred eighty".