196101951556 has 81 divisors (see below), whose sum is σ = 408489006429. Its totient is φ = 82133307648.

The previous prime is 196101951499. The next prime is 196101951587. The reversal of 196101951556 is 655159101691.

It is a happy number.

The square root of 196101951556 is 442834.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 64176088900 + 131925862656 = 253330^2 + 363216^2 .

It is a super-2 number, since 2×196101951556² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 291384436 + ... + 291385108.

Almost surely, 2^196101951556 is an apocalyptic number.

196101951556 is the 442834-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196101951556

196101951556 is an abundant number, since it is smaller than the sum of its proper divisors (212387054873).

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

196101951556 is an frugal number, since it uses more digits than its factorization.

196101951556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 49.

Multiplying 196101951556 by its sum of digits (49), we get a square (9608995626244 = 3099838²).

196101951556 divided by its sum of digits (49) gives a square (4002080644 = 63262²).

The spelling of 196101951556 in words is "one hundred ninety-six billion, one hundred one million, nine hundred fifty-one thousand, five hundred fifty-six".