401276639296 has 63 divisors (see below), whose sum is σ = 862389214893. Its totient is φ = 185174196480.

The previous prime is 401276639293. The next prime is 401276639321. The reversal of 401276639296 is 692936672104.

The square root of 401276639296 is 633464.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 59360449600 + 341916189696 = 243640^2 + 584736^2 .

It is a super-2 number, since 2×401276639296² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401276639293) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 65877211 + ... + 65883301.

Almost surely, 2^401276639296 is an apocalyptic number.

401276639296 is the 633464-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401276639296

401276639296 is an abundant number, since it is smaller than the sum of its proper divisors (461112575597).

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

401276639296 is an frugal number, since it uses more digits than its factorization.

401276639296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12220 (or 6106 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 55.

The spelling of 401276639296 in words is "four hundred one billion, two hundred seventy-six million, six hundred thirty-nine thousand, two hundred ninety-six".