401040245652 has 72 divisors (see below), whose sum is σ = 971227516896. Its totient is φ = 128792528256.

The previous prime is 401040245647. The next prime is 401040245693. The reversal of 401040245652 is 256542040104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4670418 + ... + 4755510.

It is an arithmetic number, because the mean of its divisors is an integer number (13489271068).

Almost surely, 2^401040245652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401040245652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485613758448).

401040245652 is an abundant number, since it is smaller than the sum of its proper divisors (570187271244).

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

401040245652 is a wasteful number, since it uses less digits than its factorization.

401040245652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85625 (or 85594 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 401040245652 its reverse (256542040104), we get a palindrome (657582285756).

The spelling of 401040245652 in words is "four hundred one billion, forty million, two hundred forty-five thousand, six hundred fifty-two".