61918030980 has 72 divisors (see below), whose sum is σ = 202265575512. Its totient is φ = 15241360896.

The previous prime is 61918030939. The next prime is 61918030981. The reversal of 61918030980 is 8903081916.

61918030980 is a `hidden beast` number, since 6 + 191 + 80 + 309 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1896950916 + 60021080064 = 43554^2 + 244992^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (61918030981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13228009 + ... + 13232688.

Almost surely, 2^61918030980 is an apocalyptic number.

61918030980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61918030980 is an abundant number, since it is smaller than the sum of its proper divisors (140347544532).

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

61918030980 is a wasteful number, since it uses less digits than its factorization.

61918030980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26460725 (or 26460720 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 61918030980 in words is "sixty-one billion, nine hundred eighteen million, thirty thousand, nine hundred eighty".