61123772651 has 2 divisors, whose sum is σ = 61123772652. Its totient is φ = 61123772650.

The previous prime is 61123772617. The next prime is 61123772681. The reversal of 61123772651 is 15627732116.

61123772651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61123772651 is a prime.

It is a super-2 number, since 2×61123772651² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61123772599 and 61123772608.

It is not a weakly prime, because it can be changed into another prime (61123772681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30561886325 + 30561886326.

It is an arithmetic number, because the mean of its divisors is an integer number (30561886326).

Almost surely, 2^61123772651 is an apocalyptic number.

61123772651 is a deficient number, since it is larger than the sum of its proper divisors (1).

61123772651 is an equidigital number, since it uses as much as digits as its factorization.

61123772651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The spelling of 61123772651 in words is "sixty-one billion, one hundred twenty-three million, seven hundred seventy-two thousand, six hundred fifty-one".