83772378715 has 16 divisors (see below), whose sum is σ = 101212070976. Its totient is φ = 66561264000.

The previous prime is 83772378713. The next prime is 83772378721. The reversal of 83772378715 is 51787327738.

It is not a de Polignac number, because 83772378715 - 2¹ = 83772378713 is a prime.

It is a super-2 number, since 2×83772378715² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83772378715.

It is not an unprimeable number, because it can be changed into a prime (83772378713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6738205 + ... + 6750625.

It is an arithmetic number, because the mean of its divisors is an integer number (6325754436).

Almost surely, 2^83772378715 is an apocalyptic number.

83772378715 is a deficient number, since it is larger than the sum of its proper divisors (17439692261).

83772378715 is a wasteful number, since it uses less digits than its factorization.

83772378715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21510.

The product of its digits is 13829760, while the sum is 58.

The spelling of 83772378715 in words is "eighty-three billion, seven hundred seventy-two million, three hundred seventy-eight thousand, seven hundred fifteen".