136644463870 has 24 divisors (see below), whose sum is σ = 249648561432. Its totient is φ = 53838227520.

The previous prime is 136644463849. The next prime is 136644463889. The reversal of 136644463870 is 78364446631.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 9561130 + ... + 9575410.

It is an arithmetic number, because the mean of its divisors is an integer number (10402023393).

Almost surely, 2^136644463870 is an apocalyptic number.

136644463870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136644463870 is a deficient number, since it is larger than the sum of its proper divisors (113004097562).

136644463870 is an frugal number, since it uses more digits than its factorization.

136644463870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28636 (or 14355 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 52.

The spelling of 136644463870 in words is "one hundred thirty-six billion, six hundred forty-four million, four hundred sixty-three thousand, eight hundred seventy".