154021747550 has 24 divisors (see below), whose sum is σ = 312524128872. Its totient is φ = 56007908000.

The previous prime is 154021747513. The next prime is 154021747567. The reversal of 154021747550 is 55747120451.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 154021747498 and 154021747507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140019221 + ... + 140020320.

It is an arithmetic number, because the mean of its divisors is an integer number (13021838703).

Almost surely, 2^154021747550 is an apocalyptic number.

154021747550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

154021747550 is an abundant number, since it is smaller than the sum of its proper divisors (158502381322).

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

154021747550 is a wasteful number, since it uses less digits than its factorization.

154021747550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280039564 (or 280039559 counting only the distinct ones).

The product of its (nonzero) digits is 196000, while the sum is 41.

The spelling of 154021747550 in words is "one hundred fifty-four billion, twenty-one million, seven hundred forty-seven thousand, five hundred fifty".