61810886115 has 96 divisors (see below), whose sum is σ = 119090949120. Its totient is φ = 29404166400.

The previous prime is 61810886101. The next prime is 61810886117. The reversal of 61810886115 is 51168801816.

It is a happy number.

61810886115 is a `hidden beast` number, since 6 + 18 + 10 + 8 + 8 + 611 + 5 = 666.

It is not a de Polignac number, because 61810886115 - 2⁴ = 61810886099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (61810886117) 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 95 ways as a sum of consecutive naturals, for example, 13253274 + ... + 13257936.

It is an arithmetic number, because the mean of its divisors is an integer number (1240530720).

Almost surely, 2^61810886115 is an apocalyptic number.

61810886115 is a deficient number, since it is larger than the sum of its proper divisors (57280063005).

61810886115 is a wasteful number, since it uses less digits than its factorization.

61810886115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185 (or 5182 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 45.

The spelling of 61810886115 in words is "sixty-one billion, eight hundred ten million, eight hundred eighty-six thousand, one hundred fifteen".