29145561677 has 2 divisors, whose sum is σ = 29145561678. Its totient is φ = 29145561676.

The previous prime is 29145561581. The next prime is 29145561713. The reversal of 29145561677 is 77616554192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22205172196 + 6940389481 = 149014^2 + 83309^2 .

It is a cyclic number.

It is not a de Polignac number, because 29145561677 - 2³² = 24850594381 is a prime.

It is a super-2 number, since 2×29145561677² (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 (29145561377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14572780838 + 14572780839.

It is an arithmetic number, because the mean of its divisors is an integer number (14572780839).

Almost surely, 2^29145561677 is an apocalyptic number.

It is an amenable number.

29145561677 is a deficient number, since it is larger than the sum of its proper divisors (1).

29145561677 is an equidigital number, since it uses as much as digits as its factorization.

29145561677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 53.

The spelling of 29145561677 in words is "twenty-nine billion, one hundred forty-five million, five hundred sixty-one thousand, six hundred seventy-seven".