161026512742 has 12 divisors (see below), whose sum is σ = 254921474916. Its totient is φ = 76275716220.

The previous prime is 161026512739. The next prime is 161026512791. The reversal of 161026512742 is 247215620161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111513484 + ... + 111514927.

It is an arithmetic number, because the mean of its divisors is an integer number (21243456243).

Almost surely, 2^161026512742 is an apocalyptic number.

161026512742 is a deficient number, since it is larger than the sum of its proper divisors (93894962174).

161026512742 is a wasteful number, since it uses less digits than its factorization.

161026512742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223028451 (or 223028432 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 161026512742 in words is "one hundred sixty-one billion, twenty-six million, five hundred twelve thousand, seven hundred forty-two".