268154991 has 48 divisors (see below), whose sum is σ = 456019200. Its totient is φ = 150266880.

The previous prime is 268154981. The next prime is 268155031. The reversal of 268154991 is 199451862.

268154991 is a `hidden beast` number, since 26 + 81 + 549 + 9 + 1 = 666.

It is not a de Polignac number, because 268154991 - 2⁶ = 268154927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268154911) 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, 59485 + ... + 63833.

It is an arithmetic number, because the mean of its divisors is an integer number (9500400).

Almost surely, 2^268154991 is an apocalyptic number.

268154991 is a deficient number, since it is larger than the sum of its proper divisors (187864209).

268154991 is a wasteful number, since it uses less digits than its factorization.

268154991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416 (or 4413 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 268154991 is about 16375.4386506133. The cubic root of 268154991 is about 644.8548366308.

The spelling of 268154991 in words is "two hundred sixty-eight million, one hundred fifty-four thousand, nine hundred ninety-one".