78157587082 has 8 divisors (see below), whose sum is σ = 117983109636. Its totient is φ = 38829883872.

The previous prime is 78157587049. The next prime is 78157587187. The reversal of 78157587082 is 28078575187.

It can be written as a sum of positive squares in 2 ways, for example, as 77473712281 + 683874801 = 278341^2 + 26151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78157587082² (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 3 ways as a sum of consecutive naturals, for example, 124454443 + ... + 124455070.

Almost surely, 2^78157587082 is an apocalyptic number.

78157587082 is a deficient number, since it is larger than the sum of its proper divisors (39825522554).

78157587082 is a wasteful number, since it uses less digits than its factorization.

78157587082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248909672.

The product of its (nonzero) digits is 8780800, while the sum is 58.

The spelling of 78157587082 in words is "seventy-eight billion, one hundred fifty-seven million, five hundred eighty-seven thousand, eighty-two".