536420781 has 12 divisors (see below), whose sum is σ = 834432508. Its totient is φ = 330105024.

The previous prime is 536420777. The next prime is 536420803. The reversal of 536420781 is 187024635.

536420781 is a `hidden beast` number, since 5 + 3 + 642 + 0 + 7 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39576681 + 496844100 = 6291^2 + 22290^2 .

It is not a de Polignac number, because 536420781 - 2² = 536420777 is a prime.

It is a super-2 number, since 2×536420781² = 575494508577299922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (536420081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2292280 + ... + 2292513.

Almost surely, 2^536420781 is an apocalyptic number.

It is an amenable number.

536420781 is a deficient number, since it is larger than the sum of its proper divisors (298011727).

536420781 is a wasteful number, since it uses less digits than its factorization.

536420781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584812 (or 4584809 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 536420781 is about 23160.7595082717. The cubic root of 536420781 is about 812.5221294486.

The spelling of 536420781 in words is "five hundred thirty-six million, four hundred twenty thousand, seven hundred eighty-one".