161606381794810 has 32 divisors (see below), whose sum is σ = 291485203067520. Its totient is φ = 64510629451968.

The previous prime is 161606381794807. The next prime is 161606381794813. The reversal of 161606381794810 is 18497183606161.

It is an interprime number because it is at equal distance from previous prime (161606381794807) and next prime (161606381794813).

It is a super-2 number, since 2×161606381794810² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161606381794813) 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, 95429824 + ... + 97108516.

It is an arithmetic number, because the mean of its divisors is an integer number (9108912595860).

Almost surely, 2^{161606381794810} is an apocalyptic number.

161606381794810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161606381794810 is a deficient number, since it is larger than the sum of its proper divisors (129878821272710).

161606381794810 is a wasteful number, since it uses less digits than its factorization.

161606381794810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698342.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 161606381794810 in words is "one hundred sixty-one trillion, six hundred six billion, three hundred eighty-one million, seven hundred ninety-four thousand, eight hundred ten".