7540440457 has 8 divisors (see below), whose sum is σ = 8709813792. Its totient is φ = 6451713600.

The previous prime is 7540440437. The next prime is 7540440463.

7540440457 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7540440457 - 2⁷ = 7540440329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7540440437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20161419 + ... + 20161792.

It is an arithmetic number, because the mean of its divisors is an integer number (1088726724).

Almost surely, 2^7540440457 is an apocalyptic number.

It is an amenable number.

7540440457 is a deficient number, since it is larger than the sum of its proper divisors (1169373335).

7540440457 is a wasteful number, since it uses less digits than its factorization.

7540440457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40323239.

The product of its (nonzero) digits is 313600, while the sum is 40.

The square root of 7540440457 is about 86835.7095727328. The cubic root of 7540440457 is about 1960.9457168192.

The spelling of 7540440457 in words is "seven billion, five hundred forty million, four hundred forty thousand, four hundred fifty-seven".