136820901492 has 90 divisors (see below), whose sum is σ = 393149061074. Its totient is φ = 41460867360.

The previous prime is 136820901467. The next prime is 136820901557. The reversal of 136820901492 is 294109028631.

136820901492 is a `hidden beast` number, since 13 + 68 + 2 + 0 + 90 + 1 + 492 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74876660496 + 61944240996 = 273636^2 + 248886^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1705783 + ... + 1784190.

Almost surely, 2^136820901492 is an apocalyptic number.

136820901492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

136820901492 is an abundant number, since it is smaller than the sum of its proper divisors (256328159582).

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

136820901492 is a wasteful number, since it uses less digits than its factorization.

136820901492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490011 (or 3489989 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 136820901492 in words is "one hundred thirty-six billion, eight hundred twenty million, nine hundred one thousand, four hundred ninety-two".