2537494721 has 8 divisors (see below), whose sum is σ = 2544198888. Its totient is φ = 2530800000.

The previous prime is 2537494699. The next prime is 2537494723. The reversal of 2537494721 is 1274947352.

2537494721 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 4 ways, for example, as 431143696 + 2106351025 = 20764^2 + 45895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2537494721 - 2¹⁰ = 2537493697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2537494723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141391 + ... + 1143611.

It is an arithmetic number, because the mean of its divisors is an integer number (318024861).

Almost surely, 2^2537494721 is an apocalyptic number.

It is an amenable number.

2537494721 is a deficient number, since it is larger than the sum of its proper divisors (6704167).

2537494721 is a wasteful number, since it uses less digits than its factorization.

2537494721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723.

The product of its digits is 423360, while the sum is 44.

The square root of 2537494721 is about 50373.5518005233. The cubic root of 2537494721 is about 1363.9602562142.

The spelling of 2537494721 in words is "two billion, five hundred thirty-seven million, four hundred ninety-four thousand, seven hundred twenty-one".