150948178921 has 4 divisors (see below), whose sum is σ = 152504345812. Its totient is φ = 149392012032.

The previous prime is 150948178873. The next prime is 150948178957. The reversal of 150948178921 is 129871849051.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121135322025 + 29812856896 = 348045^2 + 172664^2 .

It is a cyclic number.

It is not a de Polignac number, because 150948178921 - 2²⁵ = 150914624489 is a prime.

It is the 388521-st Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150948178961) by changing a digit.

It is a nontrivial repunit in base 388520.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778083300 + ... + 778083493.

It is an arithmetic number, because the mean of its divisors is an integer number (38126086453).

Almost surely, 2^150948178921 is an apocalyptic number.

It is an amenable number.

150948178921 is a deficient number, since it is larger than the sum of its proper divisors (1556166891).

150948178921 is an equidigital number, since it uses as much as digits as its factorization.

150948178921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556166890.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 150948178921 in words is "one hundred fifty billion, nine hundred forty-eight million, one hundred seventy-eight thousand, nine hundred twenty-one".