61324517880 has 128 divisors (see below), whose sum is σ = 207002880000. Its totient is φ = 16146179712.

The previous prime is 61324517873. The next prime is 61324517887. The reversal of 61324517880 is 8871542316.

61324517880 is a `hidden beast` number, since 613 + 24 + 5 + 1 + 7 + 8 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (61324517873) and next prime (61324517887).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61324517887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274060 + ... + 444699.

It is an arithmetic number, because the mean of its divisors is an integer number (1617210000).

Almost surely, 2^61324517880 is an apocalyptic number.

61324517880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61324517880 is an abundant number, since it is smaller than the sum of its proper divisors (145678362120).

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

61324517880 is a wasteful number, since it uses less digits than its factorization.

61324517880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718858 (or 718848 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 61324517880 in words is "sixty-one billion, three hundred twenty-four million, five hundred seventeen thousand, eight hundred eighty".