401691307242 has 16 divisors (see below), whose sum is σ = 850640415552. Its totient is φ = 126020802240.

The previous prime is 401691307187. The next prime is 401691307247. The reversal of 401691307242 is 242703196104.

It is a super-2 number, since 2×401691307242² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401691307242.

It is not an unprimeable number, because it can be changed into a prime (401691307247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1969074934 + ... + 1969075137.

It is an arithmetic number, because the mean of its divisors is an integer number (53165025972).

Almost surely, 2^401691307242 is an apocalyptic number.

401691307242 is an abundant number, since it is smaller than the sum of its proper divisors (448949108310).

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

401691307242 is a wasteful number, since it uses less digits than its factorization.

401691307242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938150093.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 401691307242 in words is "four hundred one billion, six hundred ninety-one million, three hundred seven thousand, two hundred forty-two".