405661151 has 6 divisors (see below), whose sum is σ = 471891600. Its totient is φ = 347709516.

The previous prime is 405661141. The next prime is 405661181. The reversal of 405661151 is 151166504.

It is a de Polignac number, because none of the positive numbers 2^k-405661151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405661111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4139351 + ... + 4139448.

It is an arithmetic number, because the mean of its divisors is an integer number (78648600).

Almost surely, 2^405661151 is an apocalyptic number.

405661151 is a deficient number, since it is larger than the sum of its proper divisors (66230449).

405661151 is an equidigital number, since it uses as much as digits as its factorization.

405661151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8278813 (or 8278806 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 405661151 is about 20141.0315277048. The cubic root of 405661151 is about 740.2660055371.

The spelling of 405661151 in words is "four hundred five million, six hundred sixty-one thousand, one hundred fifty-one".