150861551281 has 9 divisors (see below), whose sum is σ = 175495171449. Its totient is φ = 129307570644.

The previous prime is 150861551273. The next prime is 150861551297. The reversal of 150861551281 is 182155168051.

The square root of 150861551281 is 388409.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 150861551281 - 2³ = 150861551273 is a prime.

It is a super-2 number, since 2×150861551281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150861551881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2691120 + ... + 2746606.

Almost surely, 2^150861551281 is an apocalyptic number.

150861551281 is the 388409-th square number.

150861551281 is the 194205-th centered octagonal number.

It is an amenable number.

150861551281 is a deficient number, since it is larger than the sum of its proper divisors (24633620168).

150861551281 is an frugal number, since it uses more digits than its factorization.

150861551281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110988 (or 55494 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 43.

The spelling of 150861551281 in words is "one hundred fifty billion, eight hundred sixty-one million, five hundred fifty-one thousand, two hundred eighty-one".