1909147499995 has 32 divisors (see below), whose sum is σ = 2321079748416. Its totient is φ = 1507354368000.

The previous prime is 1909147499993. The next prime is 1909147500031. The reversal of 1909147499995 is 5999947419091.

It is not a de Polignac number, because 1909147499995 - 2¹ = 1909147499993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1909147499993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225476752 + ... + 225485218.

It is an arithmetic number, because the mean of its divisors is an integer number (72533742138).

Almost surely, 2^{1909147499995} is an apocalyptic number.

1909147499995 is a deficient number, since it is larger than the sum of its proper divisors (411932248421).

1909147499995 is a wasteful number, since it uses less digits than its factorization.

1909147499995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9951.

The product of its (nonzero) digits is 297606960, while the sum is 76.

The spelling of 1909147499995 in words is "one trillion, nine hundred nine billion, one hundred forty-seven million, four hundred ninety-nine thousand, nine hundred ninety-five".