33878136401 has 4 divisors (see below), whose sum is σ = 35870967972. Its totient is φ = 31885304832.

The previous prime is 33878136349. The next prime is 33878136449. The reversal of 33878136401 is 10463187833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10463187833 = 7 ⋅1494741119.

It can be written as a sum of positive squares in 2 ways, for example, as 26584976401 + 7293160000 = 163049^2 + 85400^2 .

It is a cyclic number.

It is not a de Polignac number, because 33878136401 - 2²² = 33873942097 is a prime.

It is a super-2 number, since 2×33878136401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33878136001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996415760 + ... + 996415793.

It is an arithmetic number, because the mean of its divisors is an integer number (8967741993).

Almost surely, 2^33878136401 is an apocalyptic number.

It is an amenable number.

33878136401 is a deficient number, since it is larger than the sum of its proper divisors (1992831571).

33878136401 is a wasteful number, since it uses less digits than its factorization.

33878136401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992831570.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 33878136401 in words is "thirty-three billion, eight hundred seventy-eight million, one hundred thirty-six thousand, four hundred one".