8157161044461 has 16 divisors (see below), whose sum is σ = 12777650867520. Its totient is φ = 4563446737920.

The previous prime is 8157161044453. The next prime is 8157161044469. The reversal of 8157161044461 is 1644401617518.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8157161044453) and next prime (8157161044469).

It is not a de Polignac number, because 8157161044461 - 2³ = 8157161044453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8157161044461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8157161044469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9507180276 + ... + 9507181133.

It is an arithmetic number, because the mean of its divisors is an integer number (798603179220).

Almost surely, 2^{8157161044461} is an apocalyptic number.

It is an amenable number.

8157161044461 is a deficient number, since it is larger than the sum of its proper divisors (4620489823059).

8157161044461 is a wasteful number, since it uses less digits than its factorization.

8157161044461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19014361436.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 8157161044461 in words is "eight trillion, one hundred fifty-seven billion, one hundred sixty-one million, forty-four thousand, four hundred sixty-one".