161148277784 has 16 divisors (see below), whose sum is σ = 325395561120. Its totient is φ = 74376128160.

The previous prime is 161148277733. The next prime is 161148277811. The reversal of 161148277784 is 487772841161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 774751232 + ... + 774751439.

It is an arithmetic number, because the mean of its divisors is an integer number (20337222570).

Almost surely, 2^161148277784 is an apocalyptic number.

It is an amenable number.

161148277784 is an abundant number, since it is smaller than the sum of its proper divisors (164247283336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161148277784 is a wasteful number, since it uses less digits than its factorization.

161148277784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549502690 (or 1549502686 counting only the distinct ones).

The product of its digits is 4214784, while the sum is 56.

The spelling of 161148277784 in words is "one hundred sixty-one billion, one hundred forty-eight million, two hundred seventy-seven thousand, seven hundred eighty-four".