2156774468 has 12 divisors (see below), whose sum is σ = 3786651792. Its totient is φ = 1074873960.

The previous prime is 2156774467. The next prime is 2156774491. The reversal of 2156774468 is 8644776512.

It is a super-2 number, since 2×2156774468² = 9303352211633366048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2156774467) 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, 876938 + ... + 879393.

It is an arithmetic number, because the mean of its divisors is an integer number (315554316).

Almost surely, 2^2156774468 is an apocalyptic number.

It is an amenable number.

2156774468 is a deficient number, since it is larger than the sum of its proper divisors (1629877324).

2156774468 is a wasteful number, since it uses less digits than its factorization.

2156774468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756642 (or 1756640 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 50.

The square root of 2156774468 is about 46441.0859907475. The cubic root of 2156774468 is about 1292.0170492052.

The spelling of 2156774468 in words is "two billion, one hundred fifty-six million, seven hundred seventy-four thousand, four hundred sixty-eight".