7426423257 has 16 divisors (see below), whose sum is σ = 10932219648. Its totient is φ = 4446633680.

The previous prime is 7426423183. The next prime is 7426423273. The reversal of 7426423257 is 7523246247.

It is a cyclic number.

It is not a de Polignac number, because 7426423257 - 2⁷ = 7426423129 is a prime.

It is a super-2 number, since 2×7426423257² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7426423297) 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 15 ways as a sum of consecutive naturals, for example, 1352943 + ... + 1358420.

It is an arithmetic number, because the mean of its divisors is an integer number (683263728).

Almost surely, 2^7426423257 is an apocalyptic number.

It is an amenable number.

7426423257 is a deficient number, since it is larger than the sum of its proper divisors (3505796391).

7426423257 is a wasteful number, since it uses less digits than its factorization.

7426423257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711460.

The product of its digits is 564480, while the sum is 42.

The square root of 7426423257 is about 86176.6978770944. The cubic root of 7426423257 is about 1951.0118138878.

The spelling of 7426423257 in words is "seven billion, four hundred twenty-six million, four hundred twenty-three thousand, two hundred fifty-seven".