2657746421 has 16 divisors (see below), whose sum is σ = 2940919488. Its totient is φ = 2381712000.

The previous prime is 2657746373. The next prime is 2657746423. The reversal of 2657746421 is 1246477562.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2657746421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2657746423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253730 + ... + 263996.

It is an arithmetic number, because the mean of its divisors is an integer number (183807468).

Almost surely, 2^2657746421 is an apocalyptic number.

It is an amenable number.

2657746421 is a deficient number, since it is larger than the sum of its proper divisors (283173067).

2657746421 is a wasteful number, since it uses less digits than its factorization.

2657746421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10612.

The product of its digits is 564480, while the sum is 44.

The square root of 2657746421 is about 51553.3356922712. The cubic root of 2657746421 is about 1385.1745831612.

The spelling of 2657746421 in words is "two billion, six hundred fifty-seven million, seven hundred forty-six thousand, four hundred twenty-one".