401002526205557 has 4 divisors (see below), whose sum is σ = 414830199523020. Its totient is φ = 387174852888096.

The previous prime is 401002526205553. The next prime is 401002526205571. The reversal of 401002526205557 is 755502625200104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 291698867689636 + 109303658515921 = 17079194^2 + 10454839^2 .

It is a cyclic number.

It is not a de Polignac number, because 401002526205557 - 2² = 401002526205553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401002526205553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6913836658688 + ... + 6913836658745.

It is an arithmetic number, because the mean of its divisors is an integer number (103707549880755).

Almost surely, 2^{401002526205557} is an apocalyptic number.

It is an amenable number.

401002526205557 is a deficient number, since it is larger than the sum of its proper divisors (13827673317463).

401002526205557 is a wasteful number, since it uses less digits than its factorization.

401002526205557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13827673317462.

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 401002526205557 in words is "four hundred one trillion, two billion, five hundred twenty-six million, two hundred five thousand, five hundred fifty-seven".