2158879478 has 16 divisors (see below), whose sum is σ = 3800962464. Its totient is φ = 900227520.

The previous prime is 2158879447. The next prime is 2158879507. The reversal of 2158879478 is 8749788512.

2158879478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 2083343 + ... + 2084378.

It is an arithmetic number, because the mean of its divisors is an integer number (237560154).

Almost surely, 2^2158879478 is an apocalyptic number.

2158879478 is a deficient number, since it is larger than the sum of its proper divisors (1642082986).

2158879478 is a wasteful number, since it uses less digits than its factorization.

2158879478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167767.

The product of its digits is 9031680, while the sum is 59.

The square root of 2158879478 is about 46463.7436933358. The cubic root of 2158879478 is about 1292.4372483679.

The spelling of 2158879478 in words is "two billion, one hundred fifty-eight million, eight hundred seventy-nine thousand, four hundred seventy-eight".