2156260772 has 12 divisors (see below), whose sum is σ = 3779440896. Its totient is φ = 1076420520.

The previous prime is 2156260763. The next prime is 2156260793. The reversal of 2156260772 is 2770626512.

It is a happy number.

It is a super-3 number, since 3×2156260772³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424628 + ... + 429675.

It is an arithmetic number, because the mean of its divisors is an integer number (314953408).

Almost surely, 2^2156260772 is an apocalyptic number.

It is an amenable number.

2156260772 is a deficient number, since it is larger than the sum of its proper divisors (1623180124).

2156260772 is a wasteful number, since it uses less digits than its factorization.

2156260772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854938 (or 854936 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 2156260772 is about 46435.5550413689. Note that the first 3 decimals coincide. The cubic root of 2156260772 is about 1291.9144644271.

The spelling of 2156260772 in words is "two billion, one hundred fifty-six million, two hundred sixty thousand, seven hundred seventy-two".