149152171920 has 80 divisors (see below), whose sum is σ = 482474869632. Its totient is φ = 38044610560.

The previous prime is 149152171913. The next prime is 149152171963. The reversal of 149152171920 is 29171251941.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13504641 + ... + 13515680.

Almost surely, 2^149152171920 is an apocalyptic number.

149152171920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149152171920 is an abundant number, since it is smaller than the sum of its proper divisors (333322697712).

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

149152171920 is a wasteful number, since it uses less digits than its factorization.

149152171920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27020360 (or 27020354 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The spelling of 149152171920 in words is "one hundred forty-nine billion, one hundred fifty-two million, one hundred seventy-one thousand, nine hundred twenty".