401285777564 has 24 divisors (see below), whose sum is σ = 808891023360. Its totient is φ = 170625447216.

The previous prime is 401285777533. The next prime is 401285777567. The reversal of 401285777564 is 465777582104.

It is a super-2 number, since 2×401285777564² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401285777567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56420204 + ... + 56427315.

It is an arithmetic number, because the mean of its divisors is an integer number (33703792640).

Almost surely, 2^401285777564 is an apocalyptic number.

It is an amenable number.

401285777564 is an abundant number, since it is smaller than the sum of its proper divisors (407605245796).

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

401285777564 is a wasteful number, since it uses less digits than its factorization.

401285777564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112847657 (or 112847655 counting only the distinct ones).

The product of its (nonzero) digits is 13171200, while the sum is 56.

The spelling of 401285777564 in words is "four hundred one billion, two hundred eighty-five million, seven hundred seventy-seven thousand, five hundred sixty-four".