401427016720420 has 24 divisors (see below), whose sum is σ = 843067332443448. Its totient is φ = 160557359577600.

The previous prime is 401427016720363. The next prime is 401427016720493. The reversal of 401427016720420 is 24027610724104.

It can be written as a sum of positive squares in 4 ways, for example, as 141826053604 + 401285190666816 = 376598^2 + 20032104^2 .

It is a super-2 number, since 2×401427016720420² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840199621 + ... + 840677260.

It is an arithmetic number, because the mean of its divisors is an integer number (35127805518477).

Almost surely, 2^{401427016720420} is an apocalyptic number.

It is an amenable number.

401427016720420 is an abundant number, since it is smaller than the sum of its proper divisors (441640315723028).

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

401427016720420 is a wasteful number, since it uses less digits than its factorization.

401427016720420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680888831 (or 1680888829 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The spelling of 401427016720420 in words is "four hundred one trillion, four hundred twenty-seven billion, sixteen million, seven hundred twenty thousand, four hundred twenty".