2015649634 has 4 divisors (see below), whose sum is σ = 3023474454. Its totient is φ = 1007824816.

The previous prime is 2015649613. The next prime is 2015649673. The reversal of 2015649634 is 4369465102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1971626409 + 44023225 = 44403^2 + 6635^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503912407 + ... + 503912410.

Almost surely, 2^2015649634 is an apocalyptic number.

2015649634 is a deficient number, since it is larger than the sum of its proper divisors (1007824820).

2015649634 is a wasteful number, since it uses less digits than its factorization.

2015649634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007824819.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 2015649634 is about 44895.9868362418. The cubic root of 2015649634 is about 1263.1987328295.

The spelling of 2015649634 in words is "two billion, fifteen million, six hundred forty-nine thousand, six hundred thirty-four".