136640078388 has 120 divisors (see below), whose sum is σ = 396282569760. Its totient is φ = 40704223680.

The previous prime is 136640078371. The next prime is 136640078431. The reversal of 136640078388 is 883870046631.

136640078388 is a `hidden beast` number, since 136 + 6 + 400 + 78 + 38 + 8 = 666.

It is a super-2 number, since 2×136640078388² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 114631 + ... + 535182.

It is an arithmetic number, because the mean of its divisors is an integer number (3302354748).

Almost surely, 2^136640078388 is an apocalyptic number.

136640078388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

136640078388 is an abundant number, since it is smaller than the sum of its proper divisors (259642491372).

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

136640078388 is a wasteful number, since it uses less digits than its factorization.

136640078388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649899 (or 649888 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 136640078388 in words is "one hundred thirty-six billion, six hundred forty million, seventy-eight thousand, three hundred eighty-eight".