78315209133 has 32 divisors (see below), whose sum is σ = 119842329600. Its totient is φ = 44562625536.

The previous prime is 78315209129. The next prime is 78315209149. The reversal of 78315209133 is 33190251387.

It is not a de Polignac number, because 78315209133 - 2² = 78315209129 is a prime.

It is a super-2 number, since 2×78315209133² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78315209123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4945933 + ... + 4961741.

It is an arithmetic number, because the mean of its divisors is an integer number (3745072800).

Almost surely, 2^78315209133 is an apocalyptic number.

It is an amenable number.

78315209133 is a deficient number, since it is larger than the sum of its proper divisors (41527120467).

78315209133 is a wasteful number, since it uses less digits than its factorization.

78315209133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16801.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 78315209133 in words is "seventy-eight billion, three hundred fifteen million, two hundred nine thousand, one hundred thirty-three".