2155725768 has 32 divisors (see below), whose sum is σ = 6159216960. Its totient is φ = 615921600.

The previous prime is 2155725739. The next prime is 2155725773. The reversal of 2155725768 is 8675275512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6415683 + ... + 6416018.

It is an arithmetic number, because the mean of its divisors is an integer number (192475530).

Almost surely, 2^2155725768 is an apocalyptic number.

2155725768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2155725768 is an abundant number, since it is smaller than the sum of its proper divisors (4003491192).

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

2155725768 is a wasteful number, since it uses less digits than its factorization.

2155725768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12831717 (or 12831713 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 48.

The square root of 2155725768 is about 46429.7939689592. The cubic root of 2155725768 is about 1291.8076071324.

The spelling of 2155725768 in words is "two billion, one hundred fifty-five million, seven hundred twenty-five thousand, seven hundred sixty-eight".