61275136669 has 2 divisors, whose sum is σ = 61275136670. Its totient is φ = 61275136668.

The previous prime is 61275136613. The next prime is 61275136673. The reversal of 61275136669 is 96663157216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49612216644 + 11662920025 = 222738^2 + 107995^2 .

It is a cyclic number.

It is not a de Polignac number, because 61275136669 - 2²³ = 61266748061 is a prime.

It is a super-2 number, since 2×61275136669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61275136369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30637568334 + 30637568335.

It is an arithmetic number, because the mean of its divisors is an integer number (30637568335).

Almost surely, 2^61275136669 is an apocalyptic number.

It is an amenable number.

61275136669 is a deficient number, since it is larger than the sum of its proper divisors (1).

61275136669 is an equidigital number, since it uses as much as digits as its factorization.

61275136669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 52.

The spelling of 61275136669 in words is "sixty-one billion, two hundred seventy-five million, one hundred thirty-six thousand, six hundred sixty-nine".