171643400156 has 12 divisors (see below), whose sum is σ = 310065497280. Its totient is φ = 83053258080.

The previous prime is 171643400143. The next prime is 171643400161. The reversal of 171643400156 is 651004346171.

It is a happy number.

It is a super-2 number, since 2×171643400156² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692110361 + ... + 692110608.

It is an arithmetic number, because the mean of its divisors is an integer number (25838791440).

Almost surely, 2^171643400156 is an apocalyptic number.

It is an amenable number.

171643400156 is a deficient number, since it is larger than the sum of its proper divisors (138422097124).

171643400156 is a wasteful number, since it uses less digits than its factorization.

171643400156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384221004 (or 1384221002 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 171643400156 in words is "one hundred seventy-one billion, six hundred forty-three million, four hundred thousand, one hundred fifty-six".