61804943236 has 9 divisors (see below), whose sum is σ = 108159520791. Its totient is φ = 30902223012.

The previous prime is 61804943219. The next prime is 61804943237. The reversal of 61804943236 is 63234940816.

The square root of 61804943236 is 248606.

It is a perfect power (a square), and thus also a powerful number.

It is a super-3 number, since 3×61804943236³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61804943237) 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 2 ways as a sum of consecutive naturals, for example, 435061 + ... + 559363.

Almost surely, 2^61804943236 is an apocalyptic number.

61804943236 is the 248606-th square number.

It is an amenable number.

61804943236 is a deficient number, since it is larger than the sum of its proper divisors (46354577555).

61804943236 is an frugal number, since it uses more digits than its factorization.

61804943236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248610 (or 124305 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 61804943236 in words is "sixty-one billion, eight hundred four million, nine hundred forty-three thousand, two hundred thirty-six".