77811133533 has 48 divisors (see below), whose sum is σ = 125980936704. Its totient is φ = 42552397440.

The previous prime is 77811133531. The next prime is 77811133537. The reversal of 77811133533 is 33533111877.

It is a happy number.

It is not a de Polignac number, because 77811133533 - 2¹ = 77811133531 is a prime.

It is a super-3 number, since 3×77811133533³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77811133531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214516 + ... + 449042.

It is an arithmetic number, because the mean of its divisors is an integer number (2624602848).

Almost surely, 2^77811133533 is an apocalyptic number.

It is an amenable number.

77811133533 is a deficient number, since it is larger than the sum of its proper divisors (48169803171).

77811133533 is a wasteful number, since it uses less digits than its factorization.

77811133533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234642 (or 234635 counting only the distinct ones).

The product of its digits is 158760, while the sum is 42.

The spelling of 77811133533 in words is "seventy-seven billion, eight hundred eleven million, one hundred thirty-three thousand, five hundred thirty-three".