1918691652 has 12 divisors (see below), whose sum is σ = 4476947216. Its totient is φ = 639563880.

The previous prime is 1918691651. The next prime is 1918691657. The reversal of 1918691652 is 2561968191.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1918691651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79945474 + ... + 79945497.

Almost surely, 2^1918691652 is an apocalyptic number.

1918691652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1918691652 is an abundant number, since it is smaller than the sum of its proper divisors (2558255564).

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

1918691652 is a wasteful number, since it uses less digits than its factorization.

1918691652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159890978 (or 159890976 counting only the distinct ones).

The product of its digits is 233280, while the sum is 48.

The square root of 1918691652 is about 43802.8726455241. The cubic root of 1918691652 is about 1242.6106228537.

The spelling of 1918691652 in words is "one billion, nine hundred eighteen million, six hundred ninety-one thousand, six hundred fifty-two".