149691570840 has 384 divisors, whose sum is σ = 590831055360. Its totient is φ = 32086167552.

The previous prime is 149691570839. The next prime is 149691570901. The reversal of 149691570840 is 48075196941.

149691570840 is a `hidden beast` number, since 1 + 4 + 9 + 69 + 1 + 570 + 8 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12117547 + ... + 12129893.

It is an arithmetic number, because the mean of its divisors is an integer number (1538622540).

Almost surely, 2^149691570840 is an apocalyptic number.

149691570840 is a gapful number since it is divisible by the number (10) 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 149691570840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295415527680).

149691570840 is an abundant number, since it is smaller than the sum of its proper divisors (441139484520).

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

149691570840 is a wasteful number, since it uses less digits than its factorization.

149691570840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12671 (or 12664 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 149691570840 in words is "one hundred forty-nine billion, six hundred ninety-one million, five hundred seventy thousand, eight hundred forty".