1999101837457 has 8 divisors (see below), whose sum is σ = 2066139809280. Its totient is φ = 1932223291680.

The previous prime is 1999101837449. The next prime is 1999101837487. The reversal of 1999101837457 is 7547381019991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1999101837457 - 2³ = 1999101837449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999101837487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39831013 + ... + 39881170.

It is an arithmetic number, because the mean of its divisors is an integer number (258267476160).

Almost surely, 2^{1999101837457} is an apocalyptic number.

It is an amenable number.

1999101837457 is a deficient number, since it is larger than the sum of its proper divisors (67037971823).

1999101837457 is an equidigital number, since it uses as much as digits as its factorization.

1999101837457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79713023.

The product of its (nonzero) digits is 17146080, while the sum is 64.

The spelling of 1999101837457 in words is "one trillion, nine hundred ninety-nine billion, one hundred one million, eight hundred thirty-seven thousand, four hundred fifty-seven".