161694629900 has 36 divisors (see below), whose sum is σ = 366132888912. Its totient is φ = 61865770560.

The previous prime is 161694629879. The next prime is 161694629903. The reversal of 161694629900 is 9926496161.

It is a super-2 number, since 2×161694629900² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161694629903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35148707 + ... + 35153306.

Almost surely, 2^161694629900 is an apocalyptic number.

161694629900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161694629900 is an abundant number, since it is smaller than the sum of its proper divisors (204438259012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161694629900 is a wasteful number, since it uses less digits than its factorization.

161694629900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70302050 (or 70302043 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 161694629900 in words is "one hundred sixty-one billion, six hundred ninety-four million, six hundred twenty-nine thousand, nine hundred".