2257722207646 has 4 divisors (see below), whose sum is σ = 3386583311472. Its totient is φ = 1128861103822.

The previous prime is 2257722207497. The next prime is 2257722207667. The reversal of 2257722207646 is 6467022277522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2257722207646² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2257722207593 and 2257722207602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564430551910 + ... + 564430551913.

It is an arithmetic number, because the mean of its divisors is an integer number (846645827868).

Almost surely, 2^{2257722207646} is an apocalyptic number.

2257722207646 is a deficient number, since it is larger than the sum of its proper divisors (1128861103826).

2257722207646 is a wasteful number, since it uses less digits than its factorization.

2257722207646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128861103825.

The product of its (nonzero) digits is 7902720, while the sum is 52.

The spelling of 2257722207646 in words is "two trillion, two hundred fifty-seven billion, seven hundred twenty-two million, two hundred seven thousand, six hundred forty-six".