78412078516 has 12 divisors (see below), whose sum is σ = 137234443780. Its totient is φ = 39202237440.

The previous prime is 78412078501. The next prime is 78412078517. The reversal of 78412078516 is 61587021487.

It can be written as a sum of positive squares in 2 ways, for example, as 8245366416 + 70166712100 = 90804^2 + 264890^2 .

It is a super-2 number, since 2×78412078516² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78412078516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78412078517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903795 + ... + 986746.

Almost surely, 2^78412078516 is an apocalyptic number.

It is an amenable number.

78412078516 is a deficient number, since it is larger than the sum of its proper divisors (58822365264).

78412078516 is a wasteful number, since it uses less digits than its factorization.

78412078516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900914 (or 1900912 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 78412078516 in words is "seventy-eight billion, four hundred twelve million, seventy-eight thousand, five hundred sixteen".