61331227560 has 96 divisors (see below), whose sum is σ = 202594209480. Its totient is φ = 16086873600.

The previous prime is 61331227547. The next prime is 61331227561. The reversal of 61331227560 is 6572213316.

61331227560 is a `hidden beast` number, since 6 + 13 + 312 + 275 + 60 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30659309604 + 30671917956 = 175098^2 + 175134^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61331227561) 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, 1374471 + ... + 1418390.

Almost surely, 2^61331227560 is an apocalyptic number.

61331227560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61331227560 is an abundant number, since it is smaller than the sum of its proper divisors (141262981920).

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

61331227560 is a wasteful number, since it uses less digits than its factorization.

61331227560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792939 (or 2792932 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 61331227560 in words is "sixty-one billion, three hundred thirty-one million, two hundred twenty-seven thousand, five hundred sixty".