150511509981 has 48 divisors (see below), whose sum is σ = 253606953600. Its totient is φ = 85981875840.

The previous prime is 150511509977. The next prime is 150511510027. The reversal of 150511509981 is 189905115051.

150511509981 is a `hidden beast` number, since 1 + 5 + 0 + 51 + 1 + 509 + 98 + 1 = 666.

It is not a de Polignac number, because 150511509981 - 2² = 150511509977 is a prime.

It is a super-2 number, since 2×150511509981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150511509781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20003086 + ... + 20010608.

It is an arithmetic number, because the mean of its divisors is an integer number (5283478200).

Almost surely, 2^150511509981 is an apocalyptic number.

It is an amenable number.

150511509981 is a deficient number, since it is larger than the sum of its proper divisors (103095443619).

150511509981 is an equidigital number, since it uses as much as digits as its factorization.

150511509981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14031 (or 14014 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 45.

The spelling of 150511509981 in words is "one hundred fifty billion, five hundred eleven million, five hundred nine thousand, nine hundred eighty-one".