61678415803 has 4 divisors (see below), whose sum is σ = 61680254968. Its totient is φ = 61676576640.

The previous prime is 61678415801. The next prime is 61678415849. The reversal of 61678415803 is 30851487616.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61678415803 - 2¹ = 61678415801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61678415801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868326 + ... + 936667.

It is an arithmetic number, because the mean of its divisors is an integer number (15420063742).

Almost surely, 2^61678415803 is an apocalyptic number.

61678415803 is a deficient number, since it is larger than the sum of its proper divisors (1839165).

61678415803 is a wasteful number, since it uses less digits than its factorization.

61678415803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839164.

The product of its (nonzero) digits is 967680, while the sum is 49.

It can be divided in two parts, 61678 and 415803, that added together give a square (477481 = 691²).

The spelling of 61678415803 in words is "sixty-one billion, six hundred seventy-eight million, four hundred fifteen thousand, eight hundred three".