33872399978 has 16 divisors (see below), whose sum is σ = 50929616160. Its totient is φ = 16895886000.

The previous prime is 33872399971. The next prime is 33872399983. The reversal of 33872399978 is 87999327833.

It is a super-2 number, since 2×33872399978² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33872399971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4956668 + ... + 4963496.

It is an arithmetic number, because the mean of its divisors is an integer number (3183101010).

Almost surely, 2^33872399978 is an apocalyptic number.

33872399978 is a deficient number, since it is larger than the sum of its proper divisors (17057216182).

33872399978 is a wasteful number, since it uses less digits than its factorization.

33872399978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12373.

The product of its digits is 123451776, while the sum is 68.

The spelling of 33872399978 in words is "thirty-three billion, eight hundred seventy-two million, three hundred ninety-nine thousand, nine hundred seventy-eight".