2257007778642 has 8 divisors (see below), whose sum is σ = 4514015557296. Its totient is φ = 752335926212.

The previous prime is 2257007778617. The next prime is 2257007778661. The reversal of 2257007778642 is 2468777007522.

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

2257007778642 is an admirable number.

It is a super-2 number, since 2×2257007778642² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188083981548 + ... + 188083981559.

It is an arithmetic number, because the mean of its divisors is an integer number (564251944662).

Almost surely, 2^{2257007778642} is an apocalyptic number.

2257007778642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2257007778642 is a wasteful number, since it uses less digits than its factorization.

2257007778642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376167963112.

The product of its (nonzero) digits is 18439680, while the sum is 57.

The spelling of 2257007778642 in words is "two trillion, two hundred fifty-seven billion, seven million, seven hundred seventy-eight thousand, six hundred forty-two".