7919211457 has 32 divisors (see below), whose sum is σ = 8644608000. Its totient is φ = 7231161600.

The previous prime is 7919211449. The next prime is 7919211481. The reversal of 7919211457 is 7541129197.

It is a cyclic number.

It is not a de Polignac number, because 7919211457 - 2³ = 7919211449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7919211427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19748457 + ... + 19748857.

It is an arithmetic number, because the mean of its divisors is an integer number (270144000).

Almost surely, 2^7919211457 is an apocalyptic number.

It is an amenable number.

7919211457 is a deficient number, since it is larger than the sum of its proper divisors (725396543).

7919211457 is a wasteful number, since it uses less digits than its factorization.

7919211457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781.

The product of its digits is 158760, while the sum is 46.

The square root of 7919211457 is about 88989.9514383506. The cubic root of 7919211457 is about 1993.2448309501.

The spelling of 7919211457 in words is "seven billion, nine hundred nineteen million, two hundred eleven thousand, four hundred fifty-seven".