78674553 has 24 divisors (see below), whose sum is σ = 116251200. Its totient is φ = 51256224.

The previous prime is 78674551. The next prime is 78674581. The reversal of 78674553 is 35547687.

It is not a de Polignac number, because 78674553 - 2¹ = 78674551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78674499 and 78674508.

It is not an unprimeable number, because it can be changed into a prime (78674551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121276 + ... + 121922.

It is an arithmetic number, because the mean of its divisors is an integer number (4843800).

Almost surely, 2^78674553 is an apocalyptic number.

It is an amenable number.

78674553 is a deficient number, since it is larger than the sum of its proper divisors (37576647).

78674553 is a wasteful number, since it uses less digits than its factorization.

78674553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 938 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 78674553 is about 8869.8676991261. The cubic root of 78674553 is about 428.4940160655.

The spelling of 78674553 in words is "seventy-eight million, six hundred seventy-four thousand, five hundred fifty-three".