2146640625 has 96 divisors (see below), whose sum is σ = 4021864704. Its totient is φ = 1102500000.

The previous prime is 2146640621. The next prime is 2146640723. The reversal of 2146640625 is 5260466412.

2146640625 is a `hidden beast` number, since 2 + 1 + 4 + 6 + 640 + 6 + 2 + 5 = 666.

It is not a de Polignac number, because 2146640625 - 2² = 2146640621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2146640625.

It is not an unprimeable number, because it can be changed into a prime (2146640621) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30234340 + ... + 30234410.

It is an arithmetic number, because the mean of its divisors is an integer number (41894424).

Almost surely, 2^2146640625 is an apocalyptic number.

2146640625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2146640625 is a deficient number, since it is larger than the sum of its proper divisors (1875224079).

2146640625 is an frugal number, since it uses more digits than its factorization.

2146640625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 2146640625 is about 46331.8532437458. The cubic root of 2146640625 is about 1289.9903100047.

The spelling of 2146640625 in words is "two billion, one hundred forty-six million, six hundred forty thousand, six hundred twenty-five".