33501961997 has 8 divisors (see below), whose sum is σ = 38309444736. Its totient is φ = 28699851312.

The previous prime is 33501961991. The next prime is 33501962009. The reversal of 33501961997 is 79916910533.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33501961997 - 2⁸ = 33501961741 is a prime.

It is a super-2 number, since 2×33501961997² (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 (33501961991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329638 + ... + 1354599.

It is an arithmetic number, because the mean of its divisors is an integer number (4788680592).

Almost surely, 2^33501961997 is an apocalyptic number.

It is an amenable number.

33501961997 is a deficient number, since it is larger than the sum of its proper divisors (4807482739).

33501961997 is a wasteful number, since it uses less digits than its factorization.

33501961997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686027.

The product of its (nonzero) digits is 1377810, while the sum is 53.

The spelling of 33501961997 in words is "thirty-three billion, five hundred one million, nine hundred sixty-one thousand, nine hundred ninety-seven".