401434897816 has 8 divisors (see below), whose sum is σ = 752690433420. Its totient is φ = 200717448904.

The previous prime is 401434897811. The next prime is 401434897841. The reversal of 401434897816 is 618798434104.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×401434897816² (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 (401434897811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25089681106 + ... + 25089681121.

Almost surely, 2^401434897816 is an apocalyptic number.

It is an amenable number.

401434897816 is a deficient number, since it is larger than the sum of its proper divisors (351255535604).

401434897816 is a wasteful number, since it uses less digits than its factorization.

401434897816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50179362233 (or 50179362229 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 55.

The spelling of 401434897816 in words is "four hundred one billion, four hundred thirty-four million, eight hundred ninety-seven thousand, eight hundred sixteen".