2156405412 has 48 divisors (see below), whose sum is σ = 5791815680. Its totient is φ = 611680032.

The previous prime is 2156405393. The next prime is 2156405431. The reversal of 2156405412 is 2145046512.

It is an interprime number because it is at equal distance from previous prime (2156405393) and next prime (2156405431).

It is a self number, because there is not a number n which added to its sum of digits gives 2156405412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80668 + ... + 104019.

Almost surely, 2^2156405412 is an apocalyptic number.

It is an amenable number.

2156405412 is an abundant number, since it is smaller than the sum of its proper divisors (3635410268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156405412 is a wasteful number, since it uses less digits than its factorization.

2156405412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184840 (or 184838 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2156405412 is about 46437.1124425281. The cubic root of 2156405412 is about 1291.9433505947.

The spelling of 2156405412 in words is "two billion, one hundred fifty-six million, four hundred five thousand, four hundred twelve".