61345773180851 has 4 divisors (see below), whose sum is σ = 61355041320600. Its totient is φ = 61336505041104.

The previous prime is 61345773180781. The next prime is 61345773180863. The reversal of 61345773180851 is 15808137754316.

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 61345773180851 - 2³⁸ = 61070895273907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61345773180151) 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, 4634059946 + ... + 4634073183.

It is an arithmetic number, because the mean of its divisors is an integer number (15338760330150).

Almost surely, 2^{61345773180851} is an apocalyptic number.

61345773180851 is a deficient number, since it is larger than the sum of its proper divisors (9268139749).

61345773180851 is an equidigital number, since it uses as much as digits as its factorization.

61345773180851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268139748.

The product of its (nonzero) digits is 16934400, while the sum is 59.

The spelling of 61345773180851 in words is "sixty-one trillion, three hundred forty-five billion, seven hundred seventy-three million, one hundred eighty thousand, eight hundred fifty-one".