161440776334 has 16 divisors (see below), whose sum is σ = 244580499072. Its totient is φ = 79914381048.

The previous prime is 161440776257. The next prime is 161440776353. The reversal of 161440776334 is 433677044161.

It is a super-2 number, since 2×161440776334² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642897 + ... + 858019.

It is an arithmetic number, because the mean of its divisors is an integer number (15286281192).

Almost surely, 2^161440776334 is an apocalyptic number.

161440776334 is a deficient number, since it is larger than the sum of its proper divisors (83139722738).

161440776334 is a wasteful number, since it uses less digits than its factorization.

161440776334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218871.

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 161440776334 in words is "one hundred sixty-one billion, four hundred forty million, seven hundred seventy-six thousand, three hundred thirty-four".