2223728155856 has 10 divisors (see below), whose sum is σ = 4308473302002. Its totient is φ = 1111864077920.

The previous prime is 2223728155823. The next prime is 2223728155871. The reversal of 2223728155856 is 6585518273222.

It can be written as a sum of positive squares in only one way, i.e., 1658645197456 + 565082958400 = 1287884^2 + 751720^2 .

It is a super-2 number, since 2×2223728155856² (a number of 25 digits) contains 22 as substring.

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, 69491504855 + ... + 69491504886.

Almost surely, 2^{2223728155856} is an apocalyptic number.

It is an amenable number.

2223728155856 is a deficient number, since it is larger than the sum of its proper divisors (2084745146146).

2223728155856 is a wasteful number, since it uses less digits than its factorization.

2223728155856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138983009749 (or 138983009743 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 56.

The spelling of 2223728155856 in words is "two trillion, two hundred twenty-three billion, seven hundred twenty-eight million, one hundred fifty-five thousand, eight hundred fifty-six".