78629761 has 12 divisors (see below), whose sum is σ = 91782768. Its totient is φ = 67164552.

The previous prime is 78629753. The next prime is 78629767. The reversal of 78629761 is 16792687.

It is a happy number.

It is not a de Polignac number, because 78629761 - 2³ = 78629753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78629767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12430 + ... + 17656.

It is an arithmetic number, because the mean of its divisors is an integer number (7648564).

Almost surely, 2^78629761 is an apocalyptic number.

It is an amenable number.

78629761 is a deficient number, since it is larger than the sum of its proper divisors (13153007).

78629761 is a wasteful number, since it uses less digits than its factorization.

78629761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5548 (or 5541 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 78629761 is about 8867.3423865327. The cubic root of 78629761 is about 428.4126820686.

The spelling of 78629761 in words is "seventy-eight million, six hundred twenty-nine thousand, seven hundred sixty-one".