136712440640 has 28 divisors (see below), whose sum is σ = 325546500036. Its totient is φ = 54684976128.

The previous prime is 136712440633. The next prime is 136712440679. The reversal of 136712440640 is 46044217631.

It can be written as a sum of positive squares in 2 ways, for example, as 15062161984 + 121650278656 = 122728^2 + 348784^2 .

It is a junction number, because it is equal to n+sod(n) for n = 136712440594 and 136712440603.

It is a congruent number.

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, 213612869 + ... + 213613508.

Almost surely, 2^136712440640 is an apocalyptic number.

136712440640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136712440640 is an abundant number, since it is smaller than the sum of its proper divisors (188834059396).

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

136712440640 is an equidigital number, since it uses as much as digits as its factorization.

136712440640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427226394 (or 427226384 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 136712440640 in words is "one hundred thirty-six billion, seven hundred twelve million, four hundred forty thousand, six hundred forty".