61799863580 has 48 divisors (see below), whose sum is σ = 159728882880. Its totient is φ = 19558637568.

The previous prime is 61799863579. The next prime is 61799863583. The reversal of 61799863580 is 8536899716.

It is a happy number.

61799863580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61799863580² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61799863583) 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, 16976165 + ... + 16979804.

It is an arithmetic number, because the mean of its divisors is an integer number (3327685060).

Almost surely, 2^61799863580 is an apocalyptic number.

It is an amenable number.

61799863580 is an abundant number, since it is smaller than the sum of its proper divisors (97929019300).

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

61799863580 is a wasteful number, since it uses less digits than its factorization.

61799863580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33955998 (or 33955996 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 61799863580 in words is "sixty-one billion, seven hundred ninety-nine million, eight hundred sixty-three thousand, five hundred eighty".