198512757040 has 40 divisors (see below), whose sum is σ = 497045405808. Its totient is φ = 73297017600.

The previous prime is 198512757029. The next prime is 198512757041. The reversal of 198512757040 is 40757215891.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (198512757041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95437786 + ... + 95439865.

Almost surely, 2^198512757040 is an apocalyptic number.

198512757040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198512757040 is an abundant number, since it is smaller than the sum of its proper divisors (298532648768).

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

198512757040 is a wasteful number, since it uses less digits than its factorization.

198512757040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190877677 (or 190877671 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 198512757040 in words is "one hundred ninety-eight billion, five hundred twelve million, seven hundred fifty-seven thousand, forty".