197057387520 has 704 divisors, whose sum is σ = 826293657600. Its totient is φ = 43582095360.

The previous prime is 197057387519. The next prime is 197057387521. The reversal of 197057387520 is 25783750791.

It is a happy number.

197057387520 is a `hidden beast` number, since 19 + 7 + 0 + 573 + 8 + 7 + 52 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (197057387519) and next prime (197057387521).

It is a super-2 number, since 2×197057387520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197057387521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29994796 + ... + 30001364.

Almost surely, 2^197057387520 is an apocalyptic number.

197057387520 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 197057387520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413146828800).

197057387520 is an abundant number, since it is smaller than the sum of its proper divisors (629236270080).

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

197057387520 is a wasteful number, since it uses less digits than its factorization.

197057387520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6641 (or 6617 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 54.

The spelling of 197057387520 in words is "one hundred ninety-seven billion, fifty-seven million, three hundred eighty-seven thousand, five hundred twenty".