2657864042 has 8 divisors (see below), whose sum is σ = 3989374500. Its totient is φ = 1328072544.

The previous prime is 2657864017. The next prime is 2657864047. The reversal of 2657864042 is 2404687562.

It can be written as a sum of positive squares in 2 ways, for example, as 2484125281 + 173738761 = 49841^2 + 13181^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2657863984 and 2657864002.

It is not an unprimeable number, because it can be changed into a prime (2657864047) 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, 425867 + ... + 432062.

Almost surely, 2^2657864042 is an apocalyptic number.

2657864042 is a deficient number, since it is larger than the sum of its proper divisors (1331510458).

2657864042 is a wasteful number, since it uses less digits than its factorization.

2657864042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859480.

The product of its (nonzero) digits is 645120, while the sum is 44.

The square root of 2657864042 is about 51554.4764496741. The cubic root of 2657864042 is about 1385.1950169160.

The spelling of 2657864042 in words is "two billion, six hundred fifty-seven million, eight hundred sixty-four thousand, forty-two".