1319881641 has 16 divisors (see below), whose sum is σ = 1896269760. Its totient is φ = 811782720.

The previous prime is 1319881639. The next prime is 1319881681. The reversal of 1319881641 is 1461889131.

It is not a de Polignac number, because 1319881641 - 2¹ = 1319881639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1319881593 and 1319881602.

It is not an unprimeable number, because it can be changed into a prime (1319881601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70015 + ... + 86843.

It is an arithmetic number, because the mean of its divisors is an integer number (118516860).

Almost surely, 2^1319881641 is an apocalyptic number.

It is an amenable number.

1319881641 is a deficient number, since it is larger than the sum of its proper divisors (576388119).

1319881641 is a wasteful number, since it uses less digits than its factorization.

1319881641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18856.

The product of its digits is 41472, while the sum is 42.

The square root of 1319881641 is about 36330.1753505265. The cubic root of 1319881641 is about 1096.9285228288.

The spelling of 1319881641 in words is "one billion, three hundred nineteen million, eight hundred eighty-one thousand, six hundred forty-one".