61026581187 has 48 divisors (see below), whose sum is σ = 103604792928. Its totient is φ = 34126064640.

The previous prime is 61026581173. The next prime is 61026581207. The reversal of 61026581187 is 78118562016.

61026581187 is a `hidden beast` number, since 61 + 0 + 2 + 6 + 581 + 1 + 8 + 7 = 666.

It is not a de Polignac number, because 61026581187 - 2²⁰ = 61025532611 is a prime.

It is a super-2 number, since 2×61026581187² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61026531187) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3436443 + ... + 3454155.

It is an arithmetic number, because the mean of its divisors is an integer number (2158433186).

Almost surely, 2^61026581187 is an apocalyptic number.

61026581187 is a deficient number, since it is larger than the sum of its proper divisors (42578211741).

61026581187 is a wasteful number, since it uses less digits than its factorization.

61026581187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20420 (or 20417 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 61026581187 in words is "sixty-one billion, twenty-six million, five hundred eighty-one thousand, one hundred eighty-seven".