78807847954 has 32 divisors (see below), whose sum is σ = 136591007616. Its totient is φ = 33703000320.

The previous prime is 78807847891. The next prime is 78807847967. The reversal of 78807847954 is 45974870887.

It is a super-2 number, since 2×78807847954² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78807847954.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1101147 + ... + 1170529.

It is an arithmetic number, because the mean of its divisors is an integer number (4268468988).

Almost surely, 2^78807847954 is an apocalyptic number.

78807847954 is a deficient number, since it is larger than the sum of its proper divisors (57783159662).

78807847954 is a wasteful number, since it uses less digits than its factorization.

78807847954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72450.

The product of its (nonzero) digits is 126443520, while the sum is 67.

The spelling of 78807847954 in words is "seventy-eight billion, eight hundred seven million, eight hundred forty-seven thousand, nine hundred fifty-four".