150778813 has 4 divisors (see below), whose sum is σ = 158714560. Its totient is φ = 142843068.

The previous prime is 150778783. The next prime is 150778829. The reversal of 150778813 is 318877051.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 318877051 = 599 ⋅532349.

It is a cyclic number.

It is not a de Polignac number, because 150778813 - 2⁵ = 150778781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150778843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3967845 + ... + 3967882.

It is an arithmetic number, because the mean of its divisors is an integer number (39678640).

Almost surely, 2^150778813 is an apocalyptic number.

It is an amenable number.

150778813 is a deficient number, since it is larger than the sum of its proper divisors (7935747).

150778813 is an equidigital number, since it uses as much as digits as its factorization.

150778813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7935746.

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 150778813 is about 12279.2024578146. The cubic root of 150778813 is about 532.2472669031.

The spelling of 150778813 in words is "one hundred fifty million, seven hundred seventy-eight thousand, eight hundred thirteen".