7494863257 has 24 divisors (see below), whose sum is σ = 8851934016. Its totient is φ = 6326576928.

The previous prime is 7494863251. The next prime is 7494863293. The reversal of 7494863257 is 7523684947.

It is not a de Polignac number, because 7494863257 - 2²³ = 7486474649 is a prime.

It is a super-2 number, since 2×7494863257² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7494863198 and 7494863207.

It is not an unprimeable number, because it can be changed into a prime (7494863251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 902908 + ... + 911170.

It is an arithmetic number, because the mean of its divisors is an integer number (368830584).

Almost surely, 2^7494863257 is an apocalyptic number.

It is an amenable number.

7494863257 is a deficient number, since it is larger than the sum of its proper divisors (1357070759).

7494863257 is a wasteful number, since it uses less digits than its factorization.

7494863257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8557 (or 8550 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 55.

The square root of 7494863257 is about 86572.8782991533. The cubic root of 7494863257 is about 1956.9868369904.

The spelling of 7494863257 in words is "seven billion, four hundred ninety-four million, eight hundred sixty-three thousand, two hundred fifty-seven".