61003640833 has 4 divisors (see below), whose sum is σ = 61265459268. Its totient is φ = 60741822400.

The previous prime is 61003640827. The next prime is 61003640851. The reversal of 61003640833 is 33804630016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16721593344 + 44282047489 = 129312^2 + 210433^2 .

It is a cyclic number.

It is not a de Polignac number, because 61003640833 - 2¹⁷ = 61003509761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61003640933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130908868 + ... + 130909333.

It is an arithmetic number, because the mean of its divisors is an integer number (15316364817).

Almost surely, 2^61003640833 is an apocalyptic number.

It is an amenable number.

61003640833 is a deficient number, since it is larger than the sum of its proper divisors (261818435).

61003640833 is a wasteful number, since it uses less digits than its factorization.

61003640833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261818434.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 61003640833 in words is "sixty-one billion, three million, six hundred forty thousand, eight hundred thirty-three".