2547621372 has 12 divisors (see below), whose sum is σ = 5944449896. Its totient is φ = 849207120.

The previous prime is 2547621371. The next prime is 2547621409. The reversal of 2547621372 is 2731267452.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2547621372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2547621371) 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, 106150879 + ... + 106150902.

Almost surely, 2^2547621372 is an apocalyptic number.

It is an amenable number.

2547621372 is an abundant number, since it is smaller than the sum of its proper divisors (3396828524).

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

2547621372 is a wasteful number, since it uses less digits than its factorization.

2547621372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212301788 (or 212301786 counting only the distinct ones).

The product of its digits is 141120, while the sum is 39.

The square root of 2547621372 is about 50473.9672702672. The cubic root of 2547621372 is about 1365.7722817879.

The spelling of 2547621372 in words is "two billion, five hundred forty-seven million, six hundred twenty-one thousand, three hundred seventy-two".