78211875474 has 48 divisors (see below), whose sum is σ = 171213475680. Its totient is φ = 25801871040.

The previous prime is 78211875461. The next prime is 78211875509. The reversal of 78211875474 is 47457811287.

It is a happy number.

78211875474 is a `hidden beast` number, since 7 + 8 + 2 + 11 + 87 + 547 + 4 = 666.

It is a super-2 number, since 2×78211875474² (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 78211875474.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 768337 + ... + 864155.

It is an arithmetic number, because the mean of its divisors is an integer number (3566947410).

Almost surely, 2^78211875474 is an apocalyptic number.

78211875474 is an abundant number, since it is smaller than the sum of its proper divisors (93001600206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78211875474 is a wasteful number, since it uses less digits than its factorization.

78211875474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96295 (or 96292 counting only the distinct ones).

The product of its digits is 3512320, while the sum is 54.

The spelling of 78211875474 in words is "seventy-eight billion, two hundred eleven million, eight hundred seventy-five thousand, four hundred seventy-four".