78561052 has 12 divisors (see below), whose sum is σ = 140076216. Its totient is φ = 38539280.

The previous prime is 78561019. The next prime is 78561053. The reversal of 78561052 is 25016587.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 78560999 and 78561017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78561053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185074 + ... + 185497.

It is an arithmetic number, because the mean of its divisors is an integer number (11673018).

Almost surely, 2^78561052 is an apocalyptic number.

It is an amenable number.

78561052 is a deficient number, since it is larger than the sum of its proper divisors (61515164).

78561052 is a wasteful number, since it uses less digits than its factorization.

78561052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370628 (or 370626 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 78561052 is about 8863.4672673847. The cubic root of 78561052 is about 428.2878591656.

The spelling of 78561052 in words is "seventy-eight million, five hundred sixty-one thousand, fifty-two".