2534521450661 has 2 divisors, whose sum is σ = 2534521450662. Its totient is φ = 2534521450660.

The previous prime is 2534521450603. The next prime is 2534521450673. The reversal of 2534521450661 is 1660541254352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2501426928100 + 33094522561 = 1581590^2 + 181919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2534521450661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2534521480661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1267260725330 + 1267260725331.

It is an arithmetic number, because the mean of its divisors is an integer number (1267260725331).

Almost surely, 2^{2534521450661} is an apocalyptic number.

It is an amenable number.

2534521450661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2534521450661 is an equidigital number, since it uses as much as digits as its factorization.

2534521450661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 2534521450661 in words is "two trillion, five hundred thirty-four billion, five hundred twenty-one million, four hundred fifty thousand, six hundred sixty-one".