33889779061 has 2 divisors, whose sum is σ = 33889779062. Its totient is φ = 33889779060.

The previous prime is 33889779041. The next prime is 33889779083. The reversal of 33889779061 is 16097798833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25967711025 + 7922068036 = 161145^2 + 89006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33889779061 is a prime.

It is a super-2 number, since 2×33889779061² (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 (33889779031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16944889530 + 16944889531.

It is an arithmetic number, because the mean of its divisors is an integer number (16944889531).

Almost surely, 2^33889779061 is an apocalyptic number.

It is an amenable number.

33889779061 is a deficient number, since it is larger than the sum of its proper divisors (1).

33889779061 is an equidigital number, since it uses as much as digits as its factorization.

33889779061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 33889779061 in words is "thirty-three billion, eight hundred eighty-nine million, seven hundred seventy-nine thousand, sixty-one".