197649064400 has 60 divisors (see below), whose sum is σ = 475522308300. Its totient is φ = 78948003840.

The previous prime is 197649064399. The next prime is 197649064427. The reversal of 197649064400 is 4460946791.

It can be written as a sum of positive squares in 6 ways, for example, as 2995153984 + 194653910416 = 54728^2 + 441196^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64865 + ... + 632064.

It is an arithmetic number, because the mean of its divisors is an integer number (7925371805).

Almost surely, 2^197649064400 is an apocalyptic number.

197649064400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197649064400 is an abundant number, since it is smaller than the sum of its proper divisors (277873243900).

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

197649064400 is a wasteful number, since it uses less digits than its factorization.

197649064400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697656 (or 697645 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 197649064400 in words is "one hundred ninety-seven billion, six hundred forty-nine million, sixty-four thousand, four hundred".