1912011945 has 8 divisors (see below), whose sum is σ = 3059219136. Its totient is φ = 1019739696.

The previous prime is 1912011929. The next prime is 1912011961. The reversal of 1912011945 is 5491102191.

It is an interprime number because it is at equal distance from previous prime (1912011929) and next prime (1912011961).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1912011945 - 2⁴ = 1912011929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63733717 + ... + 63733746.

It is an arithmetic number, because the mean of its divisors is an integer number (382402392).

Almost surely, 2^1912011945 is an apocalyptic number.

1912011945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1912011945 is a deficient number, since it is larger than the sum of its proper divisors (1147207191).

1912011945 is a wasteful number, since it uses less digits than its factorization.

1912011945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127467471.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 1912011945 is about 43726.5588058333. The cubic root of 1912011945 is about 1241.1669436509.

The spelling of 1912011945 in words is "one billion, nine hundred twelve million, eleven thousand, nine hundred forty-five".