401554491 has 16 divisors (see below), whose sum is σ = 576984576. Its totient is φ = 246941856.

The previous prime is 401554481. The next prime is 401554507. The reversal of 401554491 is 194455104.

It is not a de Polignac number, because 401554491 - 2¹⁷ = 401423419 is a prime.

It is a super-2 number, since 2×401554491² = 322492018484538162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401554411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78766 + ... + 83708.

It is an arithmetic number, because the mean of its divisors is an integer number (36061536).

Almost surely, 2^401554491 is an apocalyptic number.

401554491 is a deficient number, since it is larger than the sum of its proper divisors (175430085).

401554491 is a wasteful number, since it uses less digits than its factorization.

401554491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7042.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 401554491 is about 20038.8245912778. The cubic root of 401554491 is about 737.7595316018.

The spelling of 401554491 in words is "four hundred one million, five hundred fifty-four thousand, four hundred ninety-one".