2547240495661 has 4 divisors (see below), whose sum is σ = 2550276540000. Its totient is φ = 2544204451324.

The previous prime is 2547240495659. The next prime is 2547240495691. The reversal of 2547240495661 is 1665940427452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2547240495661 - 2¹ = 2547240495659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2547240495691) 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, 1518020911 + ... + 1518022588.

It is an arithmetic number, because the mean of its divisors is an integer number (637569135000).

Almost surely, 2^{2547240495661} is an apocalyptic number.

It is an amenable number.

2547240495661 is a deficient number, since it is larger than the sum of its proper divisors (3036044339).

2547240495661 is an equidigital number, since it uses as much as digits as its factorization.

2547240495661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036044338.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 2547240495661 in words is "two trillion, five hundred forty-seven billion, two hundred forty million, four hundred ninety-five thousand, six hundred sixty-one".