61819454679 has 8 divisors (see below), whose sum is σ = 82433810160. Its totient is φ = 41209034496.

The previous prime is 61819454677. The next prime is 61819454693. The reversal of 61819454679 is 97645491816.

61819454679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61819454679 - 2¹ = 61819454677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61819454677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946972 + ... + 1010145.

It is an arithmetic number, because the mean of its divisors is an integer number (10304226270).

Almost surely, 2^61819454679 is an apocalyptic number.

61819454679 is a deficient number, since it is larger than the sum of its proper divisors (20614355481).

61819454679 is a wasteful number, since it uses less digits than its factorization.

61819454679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967649.

The product of its digits is 13063680, while the sum is 60.

The spelling of 61819454679 in words is "sixty-one billion, eight hundred nineteen million, four hundred fifty-four thousand, six hundred seventy-nine".