196156401660 has 288 divisors, whose sum is σ = 647610163200. Its totient is φ = 47876520960.

The previous prime is 196156401659. The next prime is 196156401689. The reversal of 196156401660 is 66104651691.

196156401660 is a `hidden beast` number, since 1 + 96 + 156 + 401 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 85769037 + ... + 85771323.

It is an arithmetic number, because the mean of its divisors is an integer number (2248646400).

Almost surely, 2^196156401660 is an apocalyptic number.

196156401660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196156401660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323805081600).

196156401660 is an abundant number, since it is smaller than the sum of its proper divisors (451453761540).

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

196156401660 is a wasteful number, since it uses less digits than its factorization.

196156401660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161 (or 3156 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 196156401660 in words is "one hundred ninety-six billion, one hundred fifty-six million, four hundred one thousand, six hundred sixty".