154211121550550 has 48 divisors (see below), whose sum is σ = 319689681117840. Its totient is φ = 55000375234560.

The previous prime is 154211121550547. The next prime is 154211121550561. The reversal of 154211121550550 is 55055121112451.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4774321979 + ... + 4774354278.

It is an arithmetic number, because the mean of its divisors is an integer number (6660201689955).

Almost surely, 2^{154211121550550} is an apocalyptic number.

154211121550550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

154211121550550 is an abundant number, since it is smaller than the sum of its proper divisors (165478559567290).

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

154211121550550 is a wasteful number, since it uses less digits than its factorization.

154211121550550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9548676305 (or 9548676300 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 38.

The spelling of 154211121550550 in words is "one hundred fifty-four trillion, two hundred eleven billion, one hundred twenty-one million, five hundred fifty thousand, five hundred fifty".