78151248100 has 18 divisors (see below), whose sum is σ = 169588208594. Its totient is φ = 31260499200.

The previous prime is 78151248083. The next prime is 78151248101. The reversal of 78151248100 is 184215187.

It can be written as a sum of positive squares in 3 ways, for example, as 10754934436 + 67396313664 = 103706^2 + 259608^2 .

It is a super-2 number, since 2×78151248100² (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 78151248100.

It is not an unprimeable number, because it can be changed into a prime (78151248101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390756141 + ... + 390756340.

Almost surely, 2^78151248100 is an apocalyptic number.

It is an amenable number.

78151248100 is an abundant number, since it is smaller than the sum of its proper divisors (91436960494).

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

78151248100 is a wasteful number, since it uses less digits than its factorization.

78151248100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781512495 (or 781512488 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 37.

The spelling of 78151248100 in words is "seventy-eight billion, one hundred fifty-one million, two hundred forty-eight thousand, one hundred".