2972649257945 has 4 divisors (see below), whose sum is σ = 3567179109540. Its totient is φ = 2378119406352.

The previous prime is 2972649257933. The next prime is 2972649257947. The reversal of 2972649257945 is 5497529462792.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1636831095769 + 1335818162176 = 1279387^2 + 1155776^2 .

It is a cyclic number.

It is not a de Polignac number, because 2972649257945 - 2¹⁴ = 2972649241561 is a prime.

It is a super-2 number, since 2×2972649257945² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2972649257947) 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, 297264925790 + ... + 297264925799.

It is an arithmetic number, because the mean of its divisors is an integer number (891794777385).

Almost surely, 2^{2972649257945} is an apocalyptic number.

It is an amenable number.

2972649257945 is a deficient number, since it is larger than the sum of its proper divisors (594529851595).

2972649257945 is an equidigital number, since it uses as much as digits as its factorization.

2972649257945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594529851594.

The product of its digits is 685843200, while the sum is 71.

The spelling of 2972649257945 in words is "two trillion, nine hundred seventy-two billion, six hundred forty-nine million, two hundred fifty-seven thousand, nine hundred forty-five".