161751260011 has 16 divisors (see below), whose sum is σ = 184025899008. Its totient is φ = 140836089600.

The previous prime is 161751259993. The next prime is 161751260029. The reversal of 161751260011 is 110062157161.

It is an interprime number because it is at equal distance from previous prime (161751259993) and next prime (161751260029).

It is a cyclic number.

It is not a de Polignac number, because 161751260011 - 2¹¹ = 161751257963 is a prime.

It is a super-2 number, since 2×161751260011² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161751260911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2411995 + ... + 2478148.

It is an arithmetic number, because the mean of its divisors is an integer number (11501618688).

Almost surely, 2^161751260011 is an apocalyptic number.

161751260011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161751260011 is a deficient number, since it is larger than the sum of its proper divisors (22274638997).

161751260011 is a wasteful number, since it uses less digits than its factorization.

161751260011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890282.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 161751260011 in words is "one hundred sixty-one billion, seven hundred fifty-one million, two hundred sixty thousand, eleven".