7919091271745 has 8 divisors (see below), whose sum is σ = 9503009077416. Its totient is φ = 6335206649856.

The previous prime is 7919091271733. The next prime is 7919091271787. The reversal of 7919091271745 is 5471721909197.

It is a Cunningham number, because it is equal to 2814088²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1043960801536 + 6875130470209 = 1021744^2 + 2622047^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7919091271745 is a prime.

It is a Duffinian number.

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, 7767872 + ... + 8728001.

It is an arithmetic number, because the mean of its divisors is an integer number (1187876134677).

Almost surely, 2^{7919091271745} is an apocalyptic number.

It is an amenable number.

7919091271745 is a deficient number, since it is larger than the sum of its proper divisors (1583917805671).

7919091271745 is a wasteful number, since it uses less digits than its factorization.

7919091271745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16591891.

The product of its (nonzero) digits is 10001880, while the sum is 62.

The spelling of 7919091271745 in words is "seven trillion, nine hundred nineteen billion, ninety-one million, two hundred seventy-one thousand, seven hundred forty-five".