61498393279 has 24 divisors (see below), whose sum is σ = 68310300240. Its totient is φ = 55190483712.

The previous prime is 61498393261. The next prime is 61498393303. The reversal of 61498393279 is 97239389416.

It is not a de Polignac number, because 61498393279 - 2¹⁷ = 61498262207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61498393219) 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 23 ways as a sum of consecutive naturals, for example, 810579 + ... + 883195.

It is an arithmetic number, because the mean of its divisors is an integer number (2846262510).

Almost surely, 2^61498393279 is an apocalyptic number.

61498393279 is a deficient number, since it is larger than the sum of its proper divisors (6811906961).

61498393279 is a wasteful number, since it uses less digits than its factorization.

61498393279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72747 (or 72718 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 61.

The spelling of 61498393279 in words is "sixty-one billion, four hundred ninety-eight million, three hundred ninety-three thousand, two hundred seventy-nine".