2015562378 has 16 divisors (see below), whose sum is σ = 4129445376. Its totient is φ = 655467360.

The previous prime is 2015562377. The next prime is 2015562431. The reversal of 2015562378 is 8732655102.

It is not an unprimeable number, because it can be changed into a prime (2015562377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4096426 + ... + 4096917.

It is an arithmetic number, because the mean of its divisors is an integer number (258090336).

Almost surely, 2^2015562378 is an apocalyptic number.

2015562378 is an abundant number, since it is smaller than the sum of its proper divisors (2113882998).

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

2015562378 is a wasteful number, since it uses less digits than its factorization.

2015562378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193389.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 2015562378 is about 44895.0150684906. The cubic root of 2015562378 is about 1263.1805049164.

The spelling of 2015562378 in words is "two billion, fifteen million, five hundred sixty-two thousand, three hundred seventy-eight".