61352247780 has 72 divisors (see below), whose sum is σ = 190429791552. Its totient is φ = 15980118336.

The previous prime is 61352247769. The next prime is 61352247791. The reversal of 61352247780 is 8774225316.

61352247780 is a `hidden beast` number, since 6 + 1 + 3 + 522 + 47 + 7 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (61352247769) and next prime (61352247791).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3955584 + ... + 3971063.

It is an arithmetic number, because the mean of its divisors is an integer number (2644858216).

Almost surely, 2^61352247780 is an apocalyptic number.

61352247780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61352247780 is an abundant number, since it is smaller than the sum of its proper divisors (129077543772).

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

61352247780 is a wasteful number, since it uses less digits than its factorization.

61352247780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7926705 (or 7926700 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 61352247780 in words is "sixty-one billion, three hundred fifty-two million, two hundred forty-seven thousand, seven hundred eighty".