61654054247 has 2 divisors, whose sum is σ = 61654054248. Its totient is φ = 61654054246.

The previous prime is 61654054211. The next prime is 61654054249. The reversal of 61654054247 is 74245045616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61654054247 - 2¹⁸ = 61653792103 is a prime.

Together with 61654054249, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61654054198 and 61654054207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61654054249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30827027123 + 30827027124.

It is an arithmetic number, because the mean of its divisors is an integer number (30827027124).

Almost surely, 2^61654054247 is an apocalyptic number.

61654054247 is a deficient number, since it is larger than the sum of its proper divisors (1).

61654054247 is an equidigital number, since it uses as much as digits as its factorization.

61654054247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 61654054247 in words is "sixty-one billion, six hundred fifty-four million, fifty-four thousand, two hundred forty-seven".