161784767157 has 8 divisors (see below), whose sum is σ = 232306332384. Its totient is φ = 99559856688.

The previous prime is 161784767143. The next prime is 161784767159. The reversal of 161784767157 is 751767487161.

It is a happy number.

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

It is not a de Polignac number, because 161784767157 - 2¹² = 161784763061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161784767157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161784767159) 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, 2074163643 + ... + 2074163720.

It is an arithmetic number, because the mean of its divisors is an integer number (29038291548).

Almost surely, 2^161784767157 is an apocalyptic number.

It is an amenable number.

161784767157 is a deficient number, since it is larger than the sum of its proper divisors (70521565227).

161784767157 is a wasteful number, since it uses less digits than its factorization.

161784767157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148327379.

The product of its digits is 13829760, while the sum is 60.

The spelling of 161784767157 in words is "one hundred sixty-one billion, seven hundred eighty-four million, seven hundred sixty-seven thousand, one hundred fifty-seven".