197026976640 has 512 divisors, whose sum is σ = 695710632960. Its totient is φ = 47129886720.

The previous prime is 197026976617. The next prime is 197026976687. The reversal of 197026976640 is 46679620791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 129366919 + ... + 129368441.

It is an arithmetic number, because the mean of its divisors is an integer number (1358809830).

Almost surely, 2^197026976640 is an apocalyptic number.

197026976640 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 197026976640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347855316480).

197026976640 is an abundant number, since it is smaller than the sum of its proper divisors (498683656320).

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

197026976640 is a wasteful number, since it uses less digits than its factorization.

197026976640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702 (or 1690 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 57.

The spelling of 197026976640 in words is "one hundred ninety-seven billion, twenty-six million, nine hundred seventy-six thousand, six hundred forty".