2150665478 has 32 divisors (see below), whose sum is σ = 3777961824. Its totient is φ = 908969472.

The previous prime is 2150665477. The next prime is 2150665487. The reversal of 2150665478 is 8745660512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150665477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49400 + ... + 82107.

It is an arithmetic number, because the mean of its divisors is an integer number (118061307).

Almost surely, 2^2150665478 is an apocalyptic number.

2150665478 is a deficient number, since it is larger than the sum of its proper divisors (1627296346).

2150665478 is a wasteful number, since it uses less digits than its factorization.

2150665478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131576.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 2150665478 is about 46375.2679560992. The cubic root of 2150665478 is about 1290.7960309299.

The spelling of 2150665478 in words is "two billion, one hundred fifty million, six hundred sixty-five thousand, four hundred seventy-eight".