7919985488431 has 4 divisors (see below), whose sum is σ = 7924358756664. Its totient is φ = 7915612220200.

The previous prime is 7919985488417. The next prime is 7919985488483. The reversal of 7919985488431 is 1348845899197.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7919985488431 - 2⁵ = 7919985488399 is a prime.

It is a super-2 number, since 2×7919985488431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7919985488131) 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, 2186631400 + ... + 2186635021.

It is an arithmetic number, because the mean of its divisors is an integer number (1981089689166).

Almost surely, 2^{7919985488431} is an apocalyptic number.

7919985488431 is a deficient number, since it is larger than the sum of its proper divisors (4373268233).

7919985488431 is a wasteful number, since it uses less digits than its factorization.

7919985488431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373268232.

The product of its digits is 627056640, while the sum is 76.

The spelling of 7919985488431 in words is "seven trillion, nine hundred nineteen billion, nine hundred eighty-five million, four hundred eighty-eight thousand, four hundred thirty-one".