401854747640 has 16 divisors (see below), whose sum is σ = 904173182280. Its totient is φ = 160741899040.

The previous prime is 401854747631. The next prime is 401854747643. The reversal of 401854747640 is 46747458104.

It is a super-2 number, since 2×401854747640² (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 (401854747643) 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, 5023184306 + ... + 5023184385.

Almost surely, 2^401854747640 is an apocalyptic number.

401854747640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401854747640 is an abundant number, since it is smaller than the sum of its proper divisors (502318434640).

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

401854747640 is a wasteful number, since it uses less digits than its factorization.

401854747640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10046368702 (or 10046368698 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 50.

The spelling of 401854747640 in words is "four hundred one billion, eight hundred fifty-four million, seven hundred forty-seven thousand, six hundred forty".