33886609981 has 36 divisors (see below), whose sum is σ = 40915730880. Its totient is φ = 27981802800.

The previous prime is 33886609961. The next prime is 33886609993. The reversal of 33886609981 is 18990668833.

It is not a de Polignac number, because 33886609981 - 2¹⁵ = 33886577213 is a prime.

It is a super-2 number, since 2×33886609981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33886609901) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11252766 + ... + 11255776.

It is an arithmetic number, because the mean of its divisors is an integer number (1136548080).

Almost surely, 2^33886609981 is an apocalyptic number.

33886609981 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33886609981 is a deficient number, since it is larger than the sum of its proper divisors (7029120899).

33886609981 is a wasteful number, since it uses less digits than its factorization.

33886609981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326 (or 3288 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 33886609981 in words is "thirty-three billion, eight hundred eighty-six million, six hundred nine thousand, nine hundred eighty-one".