197920024128 has 196 divisors, whose sum is σ = 589809049488. Its totient is φ = 65866141440.

The previous prime is 197920024109. The next prime is 197920024147. The reversal of 197920024128 is 821420029791.

It is an interprime number because it is at equal distance from previous prime (197920024109) and next prime (197920024147).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 31862943 + ... + 31869153.

Almost surely, 2^197920024128 is an apocalyptic number.

197920024128 is a gapful number since it is divisible by the number (18) 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 197920024128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294904524744).

197920024128 is an abundant number, since it is smaller than the sum of its proper divisors (391889025360).

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

197920024128 is an frugal number, since it uses more digits than its factorization.

197920024128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924 (or 6899 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 197920024128 in words is "one hundred ninety-seven billion, nine hundred twenty million, twenty-four thousand, one hundred twenty-eight".