919845368761 has 12 divisors (see below), whose sum is σ = 1011513263572. Its totient is φ = 835856208000.

The previous prime is 919845368711. The next prime is 919845368779. The reversal of 919845368761 is 167863548919.

It can be written as a sum of positive squares in 2 ways, for example, as 569670205225 + 350175163536 = 754765^2 + 591756^2 .

It is not a de Polignac number, because 919845368761 - 2¹³ = 919845360569 is a prime.

It is a super-2 number, since 2×919845368761² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919845368711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1390380 + ... + 1942381.

Almost surely, 2^919845368761 is an apocalyptic number.

It is an amenable number.

919845368761 is a deficient number, since it is larger than the sum of its proper divisors (91667894811).

919845368761 is a wasteful number, since it uses less digits than its factorization.

919845368761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335064 (or 3335053 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 67.

The spelling of 919845368761 in words is "nine hundred nineteen billion, eight hundred forty-five million, three hundred sixty-eight thousand, seven hundred sixty-one".