191378650000 has 60 divisors (see below), whose sum is σ = 463465625364. Its totient is φ = 76551440000.

The previous prime is 191378649977. The next prime is 191378650069. The reversal of 191378650000 is 56873191.

It can be written as a sum of positive squares in 6 ways, for example, as 121337968896 + 70040681104 = 348336^2 + 264652^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1863787 + ... + 1963786.

Almost surely, 2^191378650000 is an apocalyptic number.

191378650000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191378650000 is an abundant number, since it is smaller than the sum of its proper divisors (272086975364).

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

191378650000 is an frugal number, since it uses more digits than its factorization.

191378650000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3827606 (or 3827580 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 191378650000 in words is "one hundred ninety-one billion, three hundred seventy-eight million, six hundred fifty thousand".