405120716540 has 24 divisors (see below), whose sum is σ = 850786608672. Its totient is φ = 162041981120.

The previous prime is 405120716521. The next prime is 405120716573. The reversal of 405120716540 is 45617021504.

It is a self number, because there is not a number n which added to its sum of digits gives 405120716540.

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, 151145 + ... + 912735.

It is an arithmetic number, because the mean of its divisors is an integer number (35449442028).

Almost surely, 2^405120716540 is an apocalyptic number.

It is an amenable number.

405120716540 is an abundant number, since it is smaller than the sum of its proper divisors (445665892132).

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

405120716540 is a wasteful number, since it uses less digits than its factorization.

405120716540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788197 (or 788195 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 405120716540 in words is "four hundred five billion, one hundred twenty million, seven hundred sixteen thousand, five hundred forty".