161699607963 has 32 divisors (see below), whose sum is σ = 239979801600. Its totient is φ = 107608778208.

The previous prime is 161699607961. The next prime is 161699607967. The reversal of 161699607963 is 369706996161.

161699607963 is a `hidden beast` number, since 1 + 6 + 16 + 9 + 9 + 607 + 9 + 6 + 3 = 666.

It is not a de Polignac number, because 161699607963 - 2¹ = 161699607961 is a prime.

It is a super-2 number, since 2×161699607963² (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 161699607963.

It is not an unprimeable number, because it can be changed into a prime (161699607961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53488270 + ... + 53491292.

It is an arithmetic number, because the mean of its divisors is an integer number (7499368800).

Almost surely, 2^161699607963 is an apocalyptic number.

161699607963 is a deficient number, since it is larger than the sum of its proper divisors (78280193637).

161699607963 is a wasteful number, since it uses less digits than its factorization.

161699607963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888 (or 5882 counting only the distinct ones).

The product of its (nonzero) digits is 19840464, while the sum is 63.

The spelling of 161699607963 in words is "one hundred sixty-one billion, six hundred ninety-nine million, six hundred seven thousand, nine hundred sixty-three".