197651376400 has 45 divisors (see below), whose sum is σ = 474878794831. Its totient is φ = 79056993920.

The previous prime is 197651376379. The next prime is 197651376431. The reversal of 197651376400 is 4673156791.

The square root of 197651376400 is 444580.

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

It can be written as a sum of positive squares in 4 ways, for example, as 27168269584 + 170483106816 = 164828^2 + 412896^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8880486 + ... + 8902714.

Almost surely, 2^197651376400 is an apocalyptic number.

197651376400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197651376400 is the 444580-th square number.

It is an amenable number.

197651376400 is an abundant number, since it is smaller than the sum of its proper divisors (277227418431).

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

197651376400 is an frugal number, since it uses more digits than its factorization.

197651376400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44476 (or 22236 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 49.

Multiplying 197651376400 by its sum of digits (49), we get a square (9684917443600 = 3112060²).

The spelling of 197651376400 in words is "one hundred ninety-seven billion, six hundred fifty-one million, three hundred seventy-six thousand, four hundred".