75564780 has 24 divisors (see below), whose sum is σ = 211581552. Its totient is φ = 20150592.

The previous prime is 75564761. The next prime is 75564799. The reversal of 75564780 is 8746557.

It is an interprime number because it is at equal distance from previous prime (75564761) and next prime (75564799).

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, 629647 + ... + 629766.

It is an arithmetic number, because the mean of its divisors is an integer number (8815898).

Almost surely, 2^75564780 is an apocalyptic number.

It is an amenable number.

75564780 is an abundant number, since it is smaller than the sum of its proper divisors (136016772).

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

75564780 is a wasteful number, since it uses less digits than its factorization.

75564780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259425 (or 1259423 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 75564780 is about 8692.8004693539. The cubic root of 75564780 is about 422.7722507981.

The spelling of 75564780 in words is "seventy-five million, five hundred sixty-four thousand, seven hundred eighty".