2925645381 has 12 divisors (see below), whose sum is σ = 4226945580. Its totient is φ = 1949962560.

The previous prime is 2925645377. The next prime is 2925645391. The reversal of 2925645381 is 1835465292.

2925645381 is a `hidden beast` number, since 2 + 9 + 2 + 564 + 5 + 3 + 81 = 666.

2925645381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2253021156 + 672624225 = 47466^2 + 25935^2 .

It is not a de Polignac number, because 2925645381 - 2² = 2925645377 is a prime.

It is a super-2 number, since 2×2925645381² = 17118801790733270322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2925645391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3025 + ... + 76553.

It is an arithmetic number, because the mean of its divisors is an integer number (352245465).

Almost surely, 2^2925645381 is an apocalyptic number.

It is an amenable number.

2925645381 is a deficient number, since it is larger than the sum of its proper divisors (1301300199).

2925645381 is a wasteful number, since it uses less digits than its factorization.

2925645381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77956 (or 77953 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 2925645381 is about 54089.2353523324. The cubic root of 2925645381 is about 1430.2344279629.

The spelling of 2925645381 in words is "two billion, nine hundred twenty-five million, six hundred forty-five thousand, three hundred eighty-one".