151994778 has 32 divisors (see below), whose sum is σ = 333559296. Its totient is φ = 45883968.

The previous prime is 151994753. The next prime is 151994837. The reversal of 151994778 is 877499151.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 151994778.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14250 + ... + 22517.

It is an arithmetic number, because the mean of its divisors is an integer number (10423728).

Almost surely, 2^151994778 is an apocalyptic number.

151994778 is an abundant number, since it is smaller than the sum of its proper divisors (181564518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151994778 is a wasteful number, since it uses less digits than its factorization.

151994778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36838.

The product of its digits is 635040, while the sum is 51.

The square root of 151994778 is about 12328.6162240537. The cubic root of 151994778 is about 533.6742180983.

The spelling of 151994778 in words is "one hundred fifty-one million, nine hundred ninety-four thousand, seven hundred seventy-eight".