420215653161 has 48 divisors (see below), whose sum is σ = 647435028240. Its totient is φ = 261721128960.

The previous prime is 420215653153. The next prime is 420215653171. The reversal of 420215653161 is 161356512024.

420215653161 is a `hidden beast` number, since 4 + 2 + 0 + 2 + 1 + 565 + 31 + 61 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 53052369561 + 367163283600 = 230331^2 + 605940^2 .

It is not a de Polignac number, because 420215653161 - 2³ = 420215653153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420215653171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13597435 + ... + 13628303.

It is an arithmetic number, because the mean of its divisors is an integer number (13488229755).

Almost surely, 2^420215653161 is an apocalyptic number.

It is an amenable number.

420215653161 is a deficient number, since it is larger than the sum of its proper divisors (227219375079).

420215653161 is a wasteful number, since it uses less digits than its factorization.

420215653161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31546 (or 31543 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 420215653161 in words is "four hundred twenty billion, two hundred fifteen million, six hundred fifty-three thousand, one hundred sixty-one".