161611299245 has 16 divisors (see below), whose sum is σ = 222698825280. Its totient is φ = 111349411200.

The previous prime is 161611299193. The next prime is 161611299251. The reversal of 161611299245 is 542992116161.

It is not a de Polignac number, because 161611299245 - 2³⁴ = 144431430061 is a prime.

It is a super-2 number, since 2×161611299245² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161611299245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77324936 + ... + 77327025.

It is an arithmetic number, because the mean of its divisors is an integer number (13918676580).

Almost surely, 2^161611299245 is an apocalyptic number.

It is an amenable number.

161611299245 is a deficient number, since it is larger than the sum of its proper divisors (61087526035).

161611299245 is a wasteful number, since it uses less digits than its factorization.

161611299245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154651996.

The product of its digits is 233280, while the sum is 47.

The spelling of 161611299245 in words is "one hundred sixty-one billion, six hundred eleven million, two hundred ninety-nine thousand, two hundred forty-five".