7249612905 has 48 divisors (see below), whose sum is σ = 12840534720. Its totient is φ = 3782620800.

The previous prime is 7249612883. The next prime is 7249612919. The reversal of 7249612905 is 5092169427.

7249612905 is a `hidden beast` number, since 7 + 24 + 9 + 612 + 9 + 0 + 5 = 666.

It is not a de Polignac number, because 7249612905 - 2²⁴ = 7232835689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 553735 + ... + 566675.

It is an arithmetic number, because the mean of its divisors is an integer number (267511140).

Almost surely, 2^7249612905 is an apocalyptic number.

It is an amenable number.

7249612905 is a deficient number, since it is larger than the sum of its proper divisors (5590921815).

7249612905 is a wasteful number, since it uses less digits than its factorization.

7249612905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13222 (or 13219 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 7249612905 is about 85144.6586991809. The cubic root of 7249612905 is about 1935.4038737929.

The spelling of 7249612905 in words is "seven billion, two hundred forty-nine million, six hundred twelve thousand, nine hundred five".