2159905402 has 16 divisors (see below), whose sum is σ = 3305697192. Its totient is φ = 1058227200.

The previous prime is 2159905381. The next prime is 2159905411. The reversal of 2159905402 is 2045099512.

It can be written as a sum of positive squares in 4 ways, for example, as 2018794761 + 141110641 = 44931^2 + 11879^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35523 + ... + 74710.

Almost surely, 2^2159905402 is an apocalyptic number.

2159905402 is a deficient number, since it is larger than the sum of its proper divisors (1145791790).

2159905402 is a wasteful number, since it uses less digits than its factorization.

2159905402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110433.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 2159905402 is about 46474.7824309055. The cubic root of 2159905402 is about 1292.6419428906.

The spelling of 2159905402 in words is "two billion, one hundred fifty-nine million, nine hundred five thousand, four hundred two".