61251342352663 has 4 divisors (see below), whose sum is σ = 61251389298208. Its totient is φ = 61251295407120.

The previous prime is 61251342352661. The next prime is 61251342352667. The reversal of 61251342352663 is 36625324315216.

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

It is a cyclic number.

It is not a de Polignac number, because 61251342352663 - 2¹ = 61251342352661 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 (61251342352661) 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, 21458031 + ... + 24144352.

It is an arithmetic number, because the mean of its divisors is an integer number (15312847324552).

Almost surely, 2^{61251342352663} is an apocalyptic number.

61251342352663 is a deficient number, since it is larger than the sum of its proper divisors (46945545).

61251342352663 is a wasteful number, since it uses less digits than its factorization.

61251342352663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46945544.

The product of its digits is 4665600, while the sum is 49.

Adding to 61251342352663 its reverse (36625324315216), we get a palindrome (97876666667879).

The spelling of 61251342352663 in words is "sixty-one trillion, two hundred fifty-one billion, three hundred forty-two million, three hundred fifty-two thousand, six hundred sixty-three".