16164878415 has 32 divisors (see below), whose sum is σ = 30246053376. Its totient is φ = 7217804160.

The previous prime is 16164878399. The next prime is 16164878461. The reversal of 16164878415 is 51487846161.

It is not a de Polignac number, because 16164878415 - 2⁴ = 16164878399 is a prime.

It is a super-2 number, since 2×16164878415² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1785616 + ... + 1794645.

It is an arithmetic number, because the mean of its divisors is an integer number (945189168).

Almost surely, 2^16164878415 is an apocalyptic number.

16164878415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16164878415 is a deficient number, since it is larger than the sum of its proper divisors (14081174961).

16164878415 is a wasteful number, since it uses less digits than its factorization.

16164878415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580319.

The product of its digits is 1290240, while the sum is 51.

The spelling of 16164878415 in words is "sixteen billion, one hundred sixty-four million, eight hundred seventy-eight thousand, four hundred fifteen".