7938812457 has 32 divisors (see below), whose sum is σ = 12282773760. Its totient is φ = 5058218880.

The previous prime is 7938812443. The next prime is 7938812471. The reversal of 7938812457 is 7542188397.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7938812443) and next prime (7938812471).

It is not a de Polignac number, because 7938812457 - 2⁶ = 7938812393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7938812417) 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, 852973 + ... + 862229.

It is an arithmetic number, because the mean of its divisors is an integer number (383836680).

Almost surely, 2^7938812457 is an apocalyptic number.

It is an amenable number.

7938812457 is a deficient number, since it is larger than the sum of its proper divisors (4343961303).

7938812457 is a wasteful number, since it uses less digits than its factorization.

7938812457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10670 (or 10664 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 7938812457 is about 89100.0137878777. The cubic root of 7938812457 is about 1994.8879828563.

The spelling of 7938812457 in words is "seven billion, nine hundred thirty-eight million, eight hundred twelve thousand, four hundred fifty-seven".