61678324819 has 24 divisors (see below), whose sum is σ = 63644586720. Its totient is φ = 59766336000.

The previous prime is 61678324793. The next prime is 61678324847. The reversal of 61678324819 is 91842387616.

It is not a de Polignac number, because 61678324819 - 2¹⁷ = 61678193747 is a prime.

It is a super-2 number, since 2×61678324819² (a number of 22 digits) contains 22 as substring.

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 61678324819.

It is not an unprimeable number, because it can be changed into a prime (61678321819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97746634 + ... + 97747264.

It is an arithmetic number, because the mean of its divisors is an integer number (2651857780).

Almost surely, 2^61678324819 is an apocalyptic number.

61678324819 is a deficient number, since it is larger than the sum of its proper divisors (1966261901).

61678324819 is a wasteful number, since it uses less digits than its factorization.

61678324819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103 (or 1042 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The spelling of 61678324819 in words is "sixty-one billion, six hundred seventy-eight million, three hundred twenty-four thousand, eight hundred nineteen".