215178830379 has 6 divisors (see below), whose sum is σ = 310813866116. Its totient is φ = 143452553580.

The previous prime is 215178830327. The next prime is 215178830423. The reversal of 215178830379 is 973038871512.

It is a happy number.

215178830379 is a `hidden beast` number, since 21 + 5 + 178 + 83 + 0 + 379 = 666.

It is not a de Polignac number, because 215178830379 - 2²¹ = 215176733227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215178835379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11954379457 + ... + 11954379474.

Almost surely, 2^215178830379 is an apocalyptic number.

215178830379 is a deficient number, since it is larger than the sum of its proper divisors (95635035737).

215178830379 is a wasteful number, since it uses less digits than its factorization.

215178830379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23908758937 (or 23908758934 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 215178830379 in words is "two hundred fifteen billion, one hundred seventy-eight million, eight hundred thirty thousand, three hundred seventy-nine".