535778991 has 48 divisors (see below), whose sum is σ = 870704640. Its totient is φ = 314684160.

The previous prime is 535778989. The next prime is 535779017. The reversal of 535778991 is 199877535.

It is not a de Polignac number, because 535778991 - 2¹ = 535778989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (535771991) 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, 525280 + ... + 526298.

It is an arithmetic number, because the mean of its divisors is an integer number (18139680).

Almost surely, 2^535778991 is an apocalyptic number.

535778991 is a deficient number, since it is larger than the sum of its proper divisors (334925649).

535778991 is a wasteful number, since it uses less digits than its factorization.

535778991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196 (or 1193 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 54.

The square root of 535778991 is about 23146.9002460373. The cubic root of 535778991 is about 812.1979581380.

It can be divided in two parts, 5357 and 78991, that added together give a palindrome (84348).

The spelling of 535778991 in words is "five hundred thirty-five million, seven hundred seventy-eight thousand, nine hundred ninety-one".