161975761970 has 32 divisors (see below), whose sum is σ = 318306252096. Its totient is φ = 58854952000.

The previous prime is 161975761967. The next prime is 161975761973. The reversal of 161975761970 is 79167579161.

It is a happy number.

161975761970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161975761967) and next prime (161975761973).

It is a super-2 number, since 2×161975761970² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161975761973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422804 + ... + 709023.

It is an arithmetic number, because the mean of its divisors is an integer number (9947070378).

Almost surely, 2^161975761970 is an apocalyptic number.

161975761970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161975761970 is a deficient number, since it is larger than the sum of its proper divisors (156330490126).

161975761970 is a wasteful number, since it uses less digits than its factorization.

161975761970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133146.

The product of its (nonzero) digits is 5000940, while the sum is 59.

The spelling of 161975761970 in words is "one hundred sixty-one billion, nine hundred seventy-five million, seven hundred sixty-one thousand, nine hundred seventy".