61612756553 has 2 divisors, whose sum is σ = 61612756554. Its totient is φ = 61612756552.

The previous prime is 61612756501. The next prime is 61612756589. The reversal of 61612756553 is 35565721616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61034690704 + 578065849 = 247052^2 + 24043^2 .

It is a cyclic number.

It is not a de Polignac number, because 61612756553 - 2¹² = 61612752457 is a prime.

It is a super-2 number, since 2×61612756553² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61612756498 and 61612756507.

It is not a weakly prime, because it can be changed into another prime (61612756453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30806378276 + 30806378277.

It is an arithmetic number, because the mean of its divisors is an integer number (30806378277).

Almost surely, 2^61612756553 is an apocalyptic number.

It is an amenable number.

61612756553 is a deficient number, since it is larger than the sum of its proper divisors (1).

61612756553 is an equidigital number, since it uses as much as digits as its factorization.

61612756553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 47.

The spelling of 61612756553 in words is "sixty-one billion, six hundred twelve million, seven hundred fifty-six thousand, five hundred fifty-three".