533279397978 has 32 divisors (see below), whose sum is σ = 1185309702720. Its totient is φ = 177723143280.

The previous prime is 533279397941. The next prime is 533279397979. The reversal of 533279397978 is 879793972335.

533279397978 is a `hidden beast` number, since 53 + 32 + 79 + 397 + 97 + 8 = 666.

It is a super-2 number, since 2×533279397978² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (533279397979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 753300 + ... + 1278287.

It is an arithmetic number, because the mean of its divisors is an integer number (37040928210).

Almost surely, 2^533279397978 is an apocalyptic number.

533279397978 is an abundant number, since it is smaller than the sum of its proper divisors (652030304742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

533279397978 is a wasteful number, since it uses less digits than its factorization.

533279397978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036459 (or 2036453 counting only the distinct ones).

The product of its digits is 540101520, while the sum is 72.

The spelling of 533279397978 in words is "five hundred thirty-three billion, two hundred seventy-nine million, three hundred ninety-seven thousand, nine hundred seventy-eight".