401551513610516 has 24 divisors (see below), whose sum is σ = 726980190025320. Its totient is φ = 193843525686272.

The previous prime is 401551513610501. The next prime is 401551513610561. The reversal of 401551513610516 is 615016315155104.

It can be written as a sum of positive squares in 4 ways, for example, as 111419769616 + 401440093840900 = 333796^2 + 20035970^2 .

It is a super-2 number, since 2×401551513610516² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77195081 + ... + 82232496.

It is an arithmetic number, because the mean of its divisors is an integer number (30290841251055).

Almost surely, 2^{401551513610516} is an apocalyptic number.

It is an amenable number.

401551513610516 is a deficient number, since it is larger than the sum of its proper divisors (325428676414804).

401551513610516 is a wasteful number, since it uses less digits than its factorization.

401551513610516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159449323 (or 159449321 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 44.

The spelling of 401551513610516 in words is "four hundred one trillion, five hundred fifty-one billion, five hundred thirteen million, six hundred ten thousand, five hundred sixteen".