78815201 has 8 divisors (see below), whose sum is σ = 79432704. Its totient is φ = 78200640.

The previous prime is 78815171. The next prime is 78815203. The reversal of 78815201 is 10251887.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78815201 - 2¹⁴ = 78798817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78815203) 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, 90896 + ... + 91758.

It is an arithmetic number, because the mean of its divisors is an integer number (9929088).

Almost surely, 2^78815201 is an apocalyptic number.

It is an amenable number.

78815201 is a deficient number, since it is larger than the sum of its proper divisors (617503).

78815201 is a wasteful number, since it uses less digits than its factorization.

78815201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 78815201 is about 8877.7925747339. The cubic root of 78815201 is about 428.7492063666.

The spelling of 78815201 in words is "seventy-eight million, eight hundred fifteen thousand, two hundred one".