6457767325421 has 4 divisors (see below), whose sum is σ = 6457876906752. Its totient is φ = 6457657744092.

The previous prime is 6457767325411. The next prime is 6457767325423. The reversal of 6457767325421 is 1245237677546.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6457767325421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6457767325423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54702221 + ... + 54820146.

It is an arithmetic number, because the mean of its divisors is an integer number (1614469226688).

Almost surely, 2^{6457767325421} is an apocalyptic number.

It is an amenable number.

6457767325421 is a deficient number, since it is larger than the sum of its proper divisors (109581331).

6457767325421 is a wasteful number, since it uses less digits than its factorization.

6457767325421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109581330.

The product of its digits is 59270400, while the sum is 59.

The spelling of 6457767325421 in words is "six trillion, four hundred fifty-seven billion, seven hundred sixty-seven million, three hundred twenty-five thousand, four hundred twenty-one".