401655767 has 4 divisors (see below), whose sum is σ = 401863800. Its totient is φ = 401447736.

The previous prime is 401655743. The next prime is 401655797. The reversal of 401655767 is 767556104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401655767 - 2⁸ = 401655511 is a prime.

It is a super-2 number, since 2×401655767² = 322654710328716578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401655707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101093 + ... + 104990.

It is an arithmetic number, because the mean of its divisors is an integer number (100465950).

Almost surely, 2^401655767 is an apocalyptic number.

401655767 is a deficient number, since it is larger than the sum of its proper divisors (208033).

401655767 is a wasteful number, since it uses less digits than its factorization.

401655767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208032.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 401655767 is about 20041.3514264882. The cubic root of 401655767 is about 737.8215497965.

The spelling of 401655767 in words is "four hundred one million, six hundred fifty-five thousand, seven hundred sixty-seven".