61819860496 has 45 divisors (see below), whose sum is σ = 121891328013. Its totient is φ = 30373373760.

The previous prime is 61819860463. The next prime is 61819860497. The reversal of 61819860496 is 69406891816.

The square root of 61819860496 is 248636.

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

It can be written as a sum of positive squares in only one way, i.e., 2010266896 + 59809593600 = 44836^2 + 244560^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61819860496.

It is not an unprimeable number, because it can be changed into a prime (61819860497) 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 8 ways as a sum of consecutive naturals, for example, 60666675 + ... + 60667693.

Almost surely, 2^61819860496 is an apocalyptic number.

61819860496 is the 248636-th square number.

It is an amenable number.

61819860496 is a deficient number, since it is larger than the sum of its proper divisors (60071467517).

61819860496 is an frugal number, since it uses more digits than its factorization.

61819860496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 58.

The spelling of 61819860496 in words is "sixty-one billion, eight hundred nineteen million, eight hundred sixty thousand, four hundred ninety-six".