78787143738 has 24 divisors (see below), whose sum is σ = 170711113248. Its totient is φ = 26261514312.

The previous prime is 78787143727. The next prime is 78787143779. The reversal of 78787143738 is 83734178787.

It is a super-2 number, since 2×78787143738² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 727381 + ... + 828647.

It is an arithmetic number, because the mean of its divisors is an integer number (7112963052).

Almost surely, 2^78787143738 is an apocalyptic number.

78787143738 is an abundant number, since it is smaller than the sum of its proper divisors (91923969510).

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

78787143738 is a wasteful number, since it uses less digits than its factorization.

78787143738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144498 (or 144495 counting only the distinct ones).

The product of its digits is 44255232, while the sum is 63.

The spelling of 78787143738 in words is "seventy-eight billion, seven hundred eighty-seven million, one hundred forty-three thousand, seven hundred thirty-eight".