136671856020 has 144 divisors (see below), whose sum is σ = 498732474240. Its totient is φ = 29595103488.

The previous prime is 136671855989. The next prime is 136671856021. The reversal of 136671856020 is 20658176631.

136671856020 is a `hidden beast` number, since 1 + 3 + 6 + 67 + 1 + 8 + 560 + 20 = 666.

It is a super-2 number, since 2×136671856020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136671856021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2830527 + ... + 2878406.

It is an arithmetic number, because the mean of its divisors is an integer number (3463419960).

Almost surely, 2^136671856020 is an apocalyptic number.

136671856020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136671856020 is an abundant number, since it is smaller than the sum of its proper divisors (362060618220).

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

136671856020 is a wasteful number, since it uses less digits than its factorization.

136671856020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708974 (or 5708969 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 136671856020 in words is "one hundred thirty-six billion, six hundred seventy-one million, eight hundred fifty-six thousand, twenty".