7919879854 has 36 divisors (see below), whose sum is σ = 12406924656. Its totient is φ = 3789972384.

The previous prime is 7919879831. The next prime is 7919879857. The reversal of 7919879854 is 4589789197.

It is a super-2 number, since 2×7919879854² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a self number, because there is not a number n which added to its sum of digits gives 7919879854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7919879857) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 57809274 + ... + 57809410.

It is an arithmetic number, because the mean of its divisors is an integer number (344636796).

Almost surely, 2^7919879854 is an apocalyptic number.

7919879854 is a deficient number, since it is larger than the sum of its proper divisors (4487044802).

7919879854 is an equidigital number, since it uses as much as digits as its factorization.

7919879854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 253 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 67.

The square root of 7919879854 is about 88993.7068224490. The cubic root of 7919879854 is about 1993.3009072986.

The spelling of 7919879854 in words is "seven billion, nine hundred nineteen million, eight hundred seventy-nine thousand, eight hundred fifty-four".