653915890 has 16 divisors (see below), whose sum is σ = 1183027032. Its totient is φ = 260237824.

The previous prime is 653915887. The next prime is 653915903. The reversal of 653915890 is 98519356.

It can be written as a sum of positive squares in 4 ways, for example, as 653773761 + 142129 = 25569^2 + 377^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 653915890.

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, 163999 + ... + 167938.

Almost surely, 2^653915890 is an apocalyptic number.

653915890 is a deficient number, since it is larger than the sum of its proper divisors (529111142).

653915890 is a wasteful number, since it uses less digits than its factorization.

653915890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332141.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 653915890 is about 25571.7791715790. The cubic root of 653915890 is about 867.9751606857.

The spelling of 653915890 in words is "six hundred fifty-three million, nine hundred fifteen thousand, eight hundred ninety".