151994961 has 10 divisors (see below), whose sum is σ = 227054322. Its totient is φ = 101329920.

The previous prime is 151994933. The next prime is 151994963. The reversal of 151994961 is 169499151.

151994961 is a `hidden beast` number, since 151 + 9 + 9 + 496 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 124746561 + 27248400 = 11169^2 + 5220^2 .

It is not a de Polignac number, because 151994961 - 2⁵ = 151994929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151994963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 938160 + ... + 938321.

Almost surely, 2^151994961 is an apocalyptic number.

It is an amenable number.

151994961 is a deficient number, since it is larger than the sum of its proper divisors (75059361).

151994961 is an equidigital number, since it uses as much as digits as its factorization.

151994961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876493 (or 1876484 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 151994961 is about 12328.6236458090. The cubic root of 151994961 is about 533.6744322775.

The spelling of 151994961 in words is "one hundred fifty-one million, nine hundred ninety-four thousand, nine hundred sixty-one".