8158461961577 has 16 divisors (see below), whose sum is σ = 8244497768832. Its totient is φ = 8072560704000.

The previous prime is 8158461961553. The next prime is 8158461961597. The reversal of 8158461961577 is 7751691648518.

It is a cyclic number.

It is not a de Polignac number, because 8158461961577 - 2¹⁸ = 8158461699433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8158461961537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789243353 + ... + 789253689.

It is an arithmetic number, because the mean of its divisors is an integer number (515281110552).

Almost surely, 2^{8158461961577} is an apocalyptic number.

It is an amenable number.

8158461961577 is a deficient number, since it is larger than the sum of its proper divisors (86035807255).

8158461961577 is a wasteful number, since it uses less digits than its factorization.

8158461961577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16048.

The product of its digits is 101606400, while the sum is 68.

The spelling of 8158461961577 in words is "eight trillion, one hundred fifty-eight billion, four hundred sixty-one million, nine hundred sixty-one thousand, five hundred seventy-seven".