61115151615609 has 32 divisors (see below), whose sum is σ = 100334966941440. Its totient is φ = 32222601891072.

The previous prime is 61115151615593. The next prime is 61115151615611. The reversal of 61115151615609 is 90651615151116.

It is not a de Polignac number, because 61115151615609 - 2⁴ = 61115151615593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61115151615629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47846262 + ... + 49106975.

It is an arithmetic number, because the mean of its divisors is an integer number (3135467716920).

Almost surely, 2^{61115151615609} is an apocalyptic number.

It is an amenable number.

61115151615609 is a deficient number, since it is larger than the sum of its proper divisors (39219815325831).

61115151615609 is a wasteful number, since it uses less digits than its factorization.

61115151615609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96955569.

The product of its (nonzero) digits is 243000, while the sum is 48.

The spelling of 61115151615609 in words is "sixty-one trillion, one hundred fifteen billion, one hundred fifty-one million, six hundred fifteen thousand, six hundred nine".