150686781 has 8 divisors (see below), whose sum is σ = 229617984. Its totient is φ = 86106720.

The previous prime is 150686773. The next prime is 150686797. The reversal of 150686781 is 187686051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 150686781 - 2³ = 150686773 is a prime.

It is a super-2 number, since 2×150686781² = 45413011936283922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150686761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3587760 + ... + 3587801.

It is an arithmetic number, because the mean of its divisors is an integer number (28702248).

Almost surely, 2^150686781 is an apocalyptic number.

It is an amenable number.

150686781 is a deficient number, since it is larger than the sum of its proper divisors (78931203).

150686781 is an equidigital number, since it uses as much as digits as its factorization.

150686781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7175571.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 150686781 is about 12275.4544111410. The cubic root of 150686781 is about 532.1389542716.

The spelling of 150686781 in words is "one hundred fifty million, six hundred eighty-six thousand, seven hundred eighty-one".