2534266721761 has 4 divisors (see below), whose sum is σ = 2542916096532. Its totient is φ = 2525617346992.

The previous prime is 2534266721699. The next prime is 2534266721797. The reversal of 2534266721761 is 1671276624352.

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 1537302414400 + 996964307361 = 1239880^2 + 998481^2 .

It is a cyclic number.

It is not a de Polignac number, because 2534266721761 - 2¹³ = 2534266713569 is a prime.

It is a super-2 number, since 2×2534266721761² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2534266721699 and 2534266721708.

It is not an unprimeable number, because it can be changed into a prime (2534266722761) 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, 4324686946 + ... + 4324687531.

It is an arithmetic number, because the mean of its divisors is an integer number (635729024133).

Almost surely, 2^{2534266721761} is an apocalyptic number.

It is an amenable number.

2534266721761 is a deficient number, since it is larger than the sum of its proper divisors (8649374771).

2534266721761 is an equidigital number, since it uses as much as digits as its factorization.

2534266721761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8649374770.

The product of its digits is 5080320, while the sum is 52.

The spelling of 2534266721761 in words is "two trillion, five hundred thirty-four billion, two hundred sixty-six million, seven hundred twenty-one thousand, seven hundred sixty-one".