2457757921 has 8 divisors (see below), whose sum is σ = 2474989920. Its totient is φ = 2440572672.

The previous prime is 2457757919. The next prime is 2457757927. The reversal of 2457757921 is 1297577542.

2457757921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2457757921 - 2¹ = 2457757919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2457757927) 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, 97350 + ... + 119968.

It is an arithmetic number, because the mean of its divisors is an integer number (309373740).

Almost surely, 2^2457757921 is an apocalyptic number.

It is an amenable number.

2457757921 is a deficient number, since it is larger than the sum of its proper divisors (17231999).

2457757921 is a wasteful number, since it uses less digits than its factorization.

2457757921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23375.

The product of its digits is 1234800, while the sum is 49.

The square root of 2457757921 is about 49575.7795803556. The cubic root of 2457757921 is about 1349.5211691870.

The spelling of 2457757921 in words is "two billion, four hundred fifty-seven million, seven hundred fifty-seven thousand, nine hundred twenty-one".