405412561556523 has 128 divisors (see below), whose sum is σ = 681285673958400. Its totient is φ = 236740008960000.

The previous prime is 405412561556501. The next prime is 405412561556537. The reversal of 405412561556523 is 325655165214504.

405412561556523 is a `hidden beast` number, since 4 + 0 + 5 + 4 + 1 + 2 + 5 + 61 + 5 + 56 + 523 = 666.

It is not a de Polignac number, because 405412561556523 - 2²⁶ = 405412494447659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405412561556523.

It is not an unprimeable number, because it can be changed into a prime (405412561556593) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 158526343 + ... + 161063423.

It is an arithmetic number, because the mean of its divisors is an integer number (5322544327800).

Almost surely, 2^{405412561556523} is an apocalyptic number.

405412561556523 is a deficient number, since it is larger than the sum of its proper divisors (275873112401877).

405412561556523 is a wasteful number, since it uses less digits than its factorization.

405412561556523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537450 (or 2537444 counting only the distinct ones).

The product of its (nonzero) digits is 21600000, while the sum is 54.

The spelling of 405412561556523 in words is "four hundred five trillion, four hundred twelve billion, five hundred sixty-one million, five hundred fifty-six thousand, five hundred twenty-three".