1915631995 has 32 divisors (see below), whose sum is σ = 2481399360. Its totient is φ = 1414533120.

The previous prime is 1915631989. The next prime is 1915631999. The reversal of 1915631995 is 5991365191.

It is not a de Polignac number, because 1915631995 - 2⁷ = 1915631867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1915631999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 990049 + ... + 991981.

It is an arithmetic number, because the mean of its divisors is an integer number (77543730).

Almost surely, 2^1915631995 is an apocalyptic number.

1915631995 is a deficient number, since it is larger than the sum of its proper divisors (565767365).

1915631995 is a wasteful number, since it uses less digits than its factorization.

1915631995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175.

The product of its digits is 328050, while the sum is 49.

The square root of 1915631995 is about 43767.9334102034. The cubic root of 1915631995 is about 1241.9497584530.

The spelling of 1915631995 in words is "one billion, nine hundred fifteen million, six hundred thirty-one thousand, nine hundred ninety-five".