161073511347747 has 4 divisors (see below), whose sum is σ = 214764681797000. Its totient is φ = 107382340898496.

The previous prime is 161073511347743. The next prime is 161073511347809. The reversal of 161073511347747 is 747743115370161.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 161073511347747 - 2² = 161073511347743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161073511347743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26845585224622 + ... + 26845585224627.

It is an arithmetic number, because the mean of its divisors is an integer number (53691170449250).

Almost surely, 2^{161073511347747} is an apocalyptic number.

161073511347747 is a deficient number, since it is larger than the sum of its proper divisors (53691170449253).

161073511347747 is an equidigital number, since it uses as much as digits as its factorization.

161073511347747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53691170449252.

The product of its (nonzero) digits is 10372320, while the sum is 57.

The spelling of 161073511347747 in words is "one hundred sixty-one trillion, seventy-three billion, five hundred eleven million, three hundred forty-seven thousand, seven hundred forty-seven".