61798339285 has 4 divisors (see below), whose sum is σ = 74158007148. Its totient is φ = 49438671424.

The previous prime is 61798339277. The next prime is 61798339303. The reversal of 61798339285 is 58293389716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30597356241 + 31200983044 = 174921^2 + 176638^2 .

It is a cyclic number.

It is not a de Polignac number, because 61798339285 - 2³ = 61798339277 is a prime.

It is a super-2 number, since 2×61798339285² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6179833924 + ... + 6179833933.

It is an arithmetic number, because the mean of its divisors is an integer number (18539501787).

Almost surely, 2^61798339285 is an apocalyptic number.

It is an amenable number.

61798339285 is a deficient number, since it is larger than the sum of its proper divisors (12359667863).

61798339285 is a wasteful number, since it uses less digits than its factorization.

61798339285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12359667862.

The product of its digits is 19595520, while the sum is 61.

The spelling of 61798339285 in words is "sixty-one billion, seven hundred ninety-eight million, three hundred thirty-nine thousand, two hundred eighty-five".