406858720725 has 72 divisors (see below), whose sum is σ = 771747459912. Its totient is φ = 204186931200.

The previous prime is 406858720693. The next prime is 406858720727. The reversal of 406858720725 is 527027858604.

406858720725 is a `hidden beast` number, since 406 + 8 + 5 + 8 + 7 + 207 + 25 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 18821919249 + 388036801476 = 137193^2 + 622926^2 .

It is not a de Polignac number, because 406858720725 - 2⁵ = 406858720693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406858720727) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 33198699 + ... + 33210951.

It is an arithmetic number, because the mean of its divisors is an integer number (10718714721).

Almost surely, 2^406858720725 is an apocalyptic number.

406858720725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

406858720725 is a deficient number, since it is larger than the sum of its proper divisors (364888739187).

406858720725 is a wasteful number, since it uses less digits than its factorization.

406858720725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20967 (or 20959 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 54.

The spelling of 406858720725 in words is "four hundred six billion, eight hundred fifty-eight million, seven hundred twenty thousand, seven hundred twenty-five".