78801961 has 8 divisors (see below), whose sum is σ = 93165120. Its totient is φ = 65215248.

The previous prime is 78801923. The next prime is 78802013. The reversal of 78801961 is 16910887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78801961 - 2⁹ = 78801449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78801161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193891 + ... + 194296.

It is an arithmetic number, because the mean of its divisors is an integer number (11645640).

Almost surely, 2^78801961 is an apocalyptic number.

It is an amenable number.

78801961 is a deficient number, since it is larger than the sum of its proper divisors (14363159).

78801961 is a wasteful number, since it uses less digits than its factorization.

78801961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388223.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 78801961 is about 8877.0468625551. The cubic root of 78801961 is about 428.7251967961.

The spelling of 78801961 in words is "seventy-eight million, eight hundred one thousand, nine hundred sixty-one".