136386880644 has 192 divisors, whose sum is σ = 392724541440. Its totient is φ = 35966177280.

The previous prime is 136386880631. The next prime is 136386880657. The reversal of 136386880644 is 446088683631.

It is an interprime number because it is at equal distance from previous prime (136386880631) and next prime (136386880657).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 84869689 + ... + 84871295.

It is an arithmetic number, because the mean of its divisors is an integer number (2045440320).

Almost surely, 2^136386880644 is an apocalyptic number.

136386880644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136386880644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196362270720).

136386880644 is an abundant number, since it is smaller than the sum of its proper divisors (256337660796).

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

136386880644 is a wasteful number, since it uses less digits than its factorization.

136386880644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978 (or 2976 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 57.

The spelling of 136386880644 in words is "one hundred thirty-six billion, three hundred eighty-six million, eight hundred eighty thousand, six hundred forty-four".