199520557788 has 48 divisors (see below), whose sum is σ = 477699667200. Its totient is φ = 64776316800.

The previous prime is 199520557787. The next prime is 199520557807. The reversal of 199520557788 is 887755025991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199520557781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43798 + ... + 633213.

It is an arithmetic number, because the mean of its divisors is an integer number (9952076400).

Almost surely, 2^199520557788 is an apocalyptic number.

It is an amenable number.

199520557788 is an abundant number, since it is smaller than the sum of its proper divisors (278179109412).

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

199520557788 is a wasteful number, since it uses less digits than its factorization.

199520557788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677658 (or 677656 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 66.

The spelling of 199520557788 in words is "one hundred ninety-nine billion, five hundred twenty million, five hundred fifty-seven thousand, seven hundred eighty-eight".