61851571467937 has 2 divisors, whose sum is σ = 61851571467938. Its totient is φ = 61851571467936.

The previous prime is 61851571467869. The next prime is 61851571467941. The reversal of 61851571467937 is 73976417515816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33303933153936 + 28547638314001 = 5770956^2 + 5342999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61851571467937 is a prime.

It is not a weakly prime, because it can be changed into another prime (61851571467967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30925785733968 + 30925785733969.

It is an arithmetic number, because the mean of its divisors is an integer number (30925785733969).

Almost surely, 2^{61851571467937} is an apocalyptic number.

It is an amenable number.

61851571467937 is a deficient number, since it is larger than the sum of its proper divisors (1).

61851571467937 is an equidigital number, since it uses as much as digits as its factorization.

61851571467937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 266716800, while the sum is 70.

The spelling of 61851571467937 in words is "sixty-one trillion, eight hundred fifty-one billion, five hundred seventy-one million, four hundred sixty-seven thousand, nine hundred thirty-seven".