1361021619 has 16 divisors (see below), whose sum is σ = 1894574592. Its totient is φ = 867449088.

The previous prime is 1361021611. The next prime is 1361021639. The reversal of 1361021619 is 9161201631.

1361021619 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1361021619 - 2³ = 1361021611 is a prime.

It is a super-2 number, since 2×1361021619² = 3704759694770762322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1361021611) 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, 175114 + ... + 182720.

It is an arithmetic number, because the mean of its divisors is an integer number (118410912).

Almost surely, 2^1361021619 is an apocalyptic number.

1361021619 is a deficient number, since it is larger than the sum of its proper divisors (533552973).

1361021619 is a wasteful number, since it uses less digits than its factorization.

1361021619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1361021619 is about 36892.0264962498. The cubic root of 1361021619 is about 1108.2090044695.

The spelling of 1361021619 in words is "one billion, three hundred sixty-one million, twenty-one thousand, six hundred nineteen".