199747780070 has 16 divisors (see below), whose sum is σ = 375178439520. Its totient is φ = 76425237504.

The previous prime is 199747780061. The next prime is 199747780091. The reversal of 199747780070 is 70087747991.

It is a junction number, because it is equal to n+sod(n) for n = 199747779991 and 199747780009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434234075 + ... + 434234534.

It is an arithmetic number, because the mean of its divisors is an integer number (23448652470).

Almost surely, 2^199747780070 is an apocalyptic number.

199747780070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199747780070 is a deficient number, since it is larger than the sum of its proper divisors (175430659450).

199747780070 is a wasteful number, since it uses less digits than its factorization.

199747780070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868468639.

The product of its (nonzero) digits is 6223392, while the sum is 59.

The spelling of 199747780070 in words is "one hundred ninety-nine billion, seven hundred forty-seven million, seven hundred eighty thousand, seventy".