401423655144 has 64 divisors (see below), whose sum is σ = 1005770001600. Its totient is φ = 133513339904.

The previous prime is 401423655121. The next prime is 401423655167. The reversal of 401423655144 is 441556324104.

It is an interprime number because it is at equal distance from previous prime (401423655121) and next prime (401423655167).

It is a super-2 number, since 2×401423655144² (a number of 24 digits) contains 22 as substring.

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, 34044802 + ... + 34056590.

It is an arithmetic number, because the mean of its divisors is an integer number (15715156275).

Almost surely, 2^401423655144 is an apocalyptic number.

It is an amenable number.

401423655144 is an abundant number, since it is smaller than the sum of its proper divisors (604346346456).

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

401423655144 is a wasteful number, since it uses less digits than its factorization.

401423655144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14802 (or 14798 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 401423655144 its reverse (441556324104), we get a palindrome (842979979248).

The spelling of 401423655144 in words is "four hundred one billion, four hundred twenty-three million, six hundred fifty-five thousand, one hundred forty-four".