61115111051 has 2 divisors, whose sum is σ = 61115111052. Its totient is φ = 61115111050.

The previous prime is 61115110963. The next prime is 61115111077. The reversal of 61115111051 is 15011151116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61115111051 - 2¹⁰ = 61115110027 is a prime.

It is a super-4 number, since 4×61115111051⁴ (a number of 44 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (61115111081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30557555525 + 30557555526.

It is an arithmetic number, because the mean of its divisors is an integer number (30557555526).

Almost surely, 2^61115111051 is an apocalyptic number.

61115111051 is a deficient number, since it is larger than the sum of its proper divisors (1).

61115111051 is an equidigital number, since it uses as much as digits as its factorization.

61115111051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 23.

Adding to 61115111051 its reverse (15011151116), we get a palindrome (76126262167).

The spelling of 61115111051 in words is "sixty-one billion, one hundred fifteen million, one hundred eleven thousand, fifty-one".