61605116012 has 12 divisors (see below), whose sum is σ = 117609767016. Its totient is φ = 28002325440.

The previous prime is 61605115963. The next prime is 61605116021. The reversal of 61605116012 is 21061150616.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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, 700058093 + ... + 700058180.

It is an arithmetic number, because the mean of its divisors is an integer number (9800813918).

Almost surely, 2^61605116012 is an apocalyptic number.

It is an amenable number.

61605116012 is a deficient number, since it is larger than the sum of its proper divisors (56004651004).

61605116012 is a wasteful number, since it uses less digits than its factorization.

61605116012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400116288 (or 1400116286 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 61605116012 its reverse (21061150616), we get a palindrome (82666266628).

The spelling of 61605116012 in words is "sixty-one billion, six hundred five million, one hundred sixteen thousand, twelve".