1949618117471 has 4 divisors (see below), whose sum is σ = 1952329687200. Its totient is φ = 1946906547744.

The previous prime is 1949618117431. The next prime is 1949618117479. The reversal of 1949618117471 is 1747118169491.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1949618117471 - 2¹⁸ = 1949617855327 is a prime.

It is a super-3 number, since 3×1949618117471³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1949618117471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949618117479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1355783786 + ... + 1355785223.

It is an arithmetic number, because the mean of its divisors is an integer number (488082421800).

Almost surely, 2^{1949618117471} is an apocalyptic number.

1949618117471 is a deficient number, since it is larger than the sum of its proper divisors (2711569729).

1949618117471 is an equidigital number, since it uses as much as digits as its factorization.

1949618117471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711569728.

The product of its digits is 3048192, while the sum is 59.

The spelling of 1949618117471 in words is "one trillion, nine hundred forty-nine billion, six hundred eighteen million, one hundred seventeen thousand, four hundred seventy-one".