61802024909 has 4 divisors (see below), whose sum is σ = 61869275040. Its totient is φ = 61734774780.

The previous prime is 61802024897. The next prime is 61802024941. The reversal of 61802024909 is 90942020816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61802024909 - 2³² = 57507057613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61802024989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33623687 + ... + 33625524.

It is an arithmetic number, because the mean of its divisors is an integer number (15467318760).

Almost surely, 2^61802024909 is an apocalyptic number.

It is an amenable number.

61802024909 is a deficient number, since it is larger than the sum of its proper divisors (67250131).

61802024909 is an equidigital number, since it uses as much as digits as its factorization.

61802024909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67250130.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 61802024909 in words is "sixty-one billion, eight hundred two million, twenty-four thousand, nine hundred nine".