154261621920 has 384 divisors, whose sum is σ = 590436532224. Its totient is φ = 33089531904.

The previous prime is 154261621909. The next prime is 154261621937. The reversal of 154261621920 is 29126162451.

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, 4077009 + ... + 4114671.

It is an arithmetic number, because the mean of its divisors is an integer number (1537595136).

Almost surely, 2^154261621920 is an apocalyptic number.

154261621920 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 154261621920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295218266112).

154261621920 is an abundant number, since it is smaller than the sum of its proper divisors (436174910304).

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

154261621920 is a wasteful number, since it uses less digits than its factorization.

154261621920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37764 (or 37756 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 154261621920 in words is "one hundred fifty-four billion, two hundred sixty-one million, six hundred twenty-one thousand, nine hundred twenty".