61245349680 has 40 divisors (see below), whose sum is σ = 189860584752. Its totient is φ = 16332093184.

The previous prime is 61245349663. The next prime is 61245349691. The reversal of 61245349680 is 8694354216.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×61245349680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127594239 + ... + 127594718.

Almost surely, 2^61245349680 is an apocalyptic number.

61245349680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61245349680 is an abundant number, since it is smaller than the sum of its proper divisors (128615235072).

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

61245349680 is a wasteful number, since it uses less digits than its factorization.

61245349680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255188973 (or 255188967 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 61245349680 in words is "sixty-one billion, two hundred forty-five million, three hundred forty-nine thousand, six hundred eighty".