61887350187 has 16 divisors (see below), whose sum is σ = 98737653280. Its totient is φ = 38084522976.

The previous prime is 61887350179. The next prime is 61887350197. The reversal of 61887350187 is 78105378816.

It is a happy number.

61887350187 is a `hidden beast` number, since 61 + 8 + 8 + 73 + 501 + 8 + 7 = 666.

It is not a de Polignac number, because 61887350187 - 2³ = 61887350179 is a prime.

It is a super-2 number, since 2×61887350187² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61887350197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88158268 + ... + 88158969.

It is an arithmetic number, because the mean of its divisors is an integer number (6171103330).

Almost surely, 2^61887350187 is an apocalyptic number.

61887350187 is a deficient number, since it is larger than the sum of its proper divisors (36850303093).

61887350187 is a wasteful number, since it uses less digits than its factorization.

61887350187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176317259 (or 176317253 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 61887350187 in words is "sixty-one billion, eight hundred eighty-seven million, three hundred fifty thousand, one hundred eighty-seven".