61394819586 has 128 divisors (see below), whose sum is σ = 138779688960. Its totient is φ = 18012456000.

The previous prime is 61394819573. The next prime is 61394819593. The reversal of 61394819586 is 68591849316.

It is a super-2 number, since 2×61394819586² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21533061 + ... + 21535911.

It is an arithmetic number, because the mean of its divisors is an integer number (1084216320).

Almost surely, 2^61394819586 is an apocalyptic number.

61394819586 is an abundant number, since it is smaller than the sum of its proper divisors (77384869374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61394819586 is a wasteful number, since it uses less digits than its factorization.

61394819586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132.

The product of its digits is 11197440, while the sum is 60.

The spelling of 61394819586 in words is "sixty-one billion, three hundred ninety-four million, eight hundred nineteen thousand, five hundred eighty-six".