61111005565651 has 2 divisors, whose sum is σ = 61111005565652. Its totient is φ = 61111005565650.

The previous prime is 61111005565567. The next prime is 61111005565697. The reversal of 61111005565651 is 15656550011116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61111005565651 - 2³¹ = 61108858082003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61111005565598 and 61111005565607.

It is not a weakly prime, because it can be changed into another prime (61111005566651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30555502782825 + 30555502782826.

It is an arithmetic number, because the mean of its divisors is an integer number (30555502782826).

Almost surely, 2^{61111005565651} is an apocalyptic number.

61111005565651 is a deficient number, since it is larger than the sum of its proper divisors (1).

61111005565651 is an equidigital number, since it uses as much as digits as its factorization.

61111005565651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 43.

Adding to 61111005565651 its reverse (15656550011116), we get a palindrome (76767555576767).

The spelling of 61111005565651 in words is "sixty-one trillion, one hundred eleven billion, five million, five hundred sixty-five thousand, six hundred fifty-one".