1913391650 has 24 divisors (see below), whose sum is σ = 3768257700. Its totient is φ = 720335360.

The previous prime is 1913391647. The next prime is 1913391691. The reversal of 1913391650 is 561933191.

1913391650 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 876100801 + 1037290849 = 29599^2 + 32207^2 .

It is a super-2 number, since 2×1913391650² = 7322135212579445000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1124675 + ... + 1126374.

Almost surely, 2^1913391650 is an apocalyptic number.

1913391650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1913391650 is a deficient number, since it is larger than the sum of its proper divisors (1854866050).

1913391650 is a wasteful number, since it uses less digits than its factorization.

1913391650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251078 (or 2251073 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 1913391650 is about 43742.3324709600. The cubic root of 1913391650 is about 1241.4654132828.

The spelling of 1913391650 in words is "one billion, nine hundred thirteen million, three hundred ninety-one thousand, six hundred fifty".