405116720651 has 4 divisors (see below), whose sum is σ = 405130530000. Its totient is φ = 405102911304.

The previous prime is 405116720611. The next prime is 405116720663. The reversal of 405116720651 is 156027611504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 405116720651 - 2¹⁰ = 405116719627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405116720611) 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, 6860576 + ... + 6919373.

It is an arithmetic number, because the mean of its divisors is an integer number (101282632500).

Almost surely, 2^405116720651 is an apocalyptic number.

405116720651 is a deficient number, since it is larger than the sum of its proper divisors (13809349).

405116720651 is a wasteful number, since it uses less digits than its factorization.

405116720651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13809348.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 405116720651 in words is "four hundred five billion, one hundred sixteen million, seven hundred twenty thousand, six hundred fifty-one".