401566690293 has 16 divisors (see below), whose sum is σ = 558059913216. Its totient is φ = 256559983920.

The previous prime is 401566690229. The next prime is 401566690309. The reversal of 401566690293 is 392096665104.

It is not a de Polignac number, because 401566690293 - 2⁶ = 401566690229 is a prime.

It is a super-2 number, since 2×401566690293² (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 (401566690223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20951205 + ... + 20970362.

It is an arithmetic number, because the mean of its divisors is an integer number (34878744576).

Almost surely, 2^401566690293 is an apocalyptic number.

It is an amenable number.

401566690293 is a deficient number, since it is larger than the sum of its proper divisors (156493222923).

401566690293 is a wasteful number, since it uses less digits than its factorization.

401566690293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41921704.

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 401566690293 in words is "four hundred one billion, five hundred sixty-six million, six hundred ninety thousand, two hundred ninety-three".