61657147451723 has 2 divisors, whose sum is σ = 61657147451724. Its totient is φ = 61657147451722.

The previous prime is 61657147451681. The next prime is 61657147451777. The reversal of 61657147451723 is 32715474175616.

61657147451723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61657147451723 - 2³⁰ = 61656073709899 is a prime.

It is not a weakly prime, because it can be changed into another prime (61657147451323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30828573725861 + 30828573725862.

It is an arithmetic number, because the mean of its divisors is an integer number (30828573725862).

Almost surely, 2^{61657147451723} is an apocalyptic number.

61657147451723 is a deficient number, since it is larger than the sum of its proper divisors (1).

61657147451723 is an equidigital number, since it uses as much as digits as its factorization.

61657147451723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29635200, while the sum is 59.

The spelling of 61657147451723 in words is "sixty-one trillion, six hundred fifty-seven billion, one hundred forty-seven million, four hundred fifty-one thousand, seven hundred twenty-three".