7861786170261 has 8 divisors (see below), whose sum is σ = 10482511438464. Its totient is φ = 5241125841120.

The previous prime is 7861786170247. The next prime is 7861786170269. The reversal of 7861786170261 is 1620716871687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7861786170261 - 2¹⁸ = 7861785908117 is a prime.

It is a super-3 number, since 3×7861786170261³ (a number of 40 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7861786170195 and 7861786170204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7861786170269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15951576 + ... + 16437041.

It is an arithmetic number, because the mean of its divisors is an integer number (1310313929808).

Almost surely, 2^{7861786170261} is an apocalyptic number.

It is an amenable number.

7861786170261 is a deficient number, since it is larger than the sum of its proper divisors (2620725268203).

7861786170261 is a wasteful number, since it uses less digits than its factorization.

7861786170261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32469531.

The product of its (nonzero) digits is 9483264, while the sum is 60.

The spelling of 7861786170261 in words is "seven trillion, eight hundred sixty-one billion, seven hundred eighty-six million, one hundred seventy thousand, two hundred sixty-one".