61765806220 has 48 divisors (see below), whose sum is σ = 131345676000. Its totient is φ = 24394761216.

The previous prime is 61765806211. The next prime is 61765806229. The reversal of 61765806220 is 2260856716.

It is an interprime number because it is at equal distance from previous prime (61765806211) and next prime (61765806229).

It is not an unprimeable number, because it can be changed into a prime (61765806229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3199156 + ... + 3218404.

It is an arithmetic number, because the mean of its divisors is an integer number (2736368250).

Almost surely, 2^61765806220 is an apocalyptic number.

It is an amenable number.

61765806220 is an abundant number, since it is smaller than the sum of its proper divisors (69579869780).

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

61765806220 is a wasteful number, since it uses less digits than its factorization.

61765806220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21274 (or 21272 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 61765806220 in words is "sixty-one billion, seven hundred sixty-five million, eight hundred six thousand, two hundred twenty".