1211919489646 has 12 divisors (see below), whose sum is σ = 1821036265848. Its totient is φ = 604909222272.

The previous prime is 1211919489623. The next prime is 1211919489653. The reversal of 1211919489646 is 6469849191121.

It is a super-2 number, since 2×1211919489646² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244186 + ... + 1575901.

It is an arithmetic number, because the mean of its divisors is an integer number (151753022154).

Almost surely, 2^{1211919489646} is an apocalyptic number.

1211919489646 is a deficient number, since it is larger than the sum of its proper divisors (609116776202).

1211919489646 is an frugal number, since it uses more digits than its factorization.

1211919489646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821243 (or 1820666 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 61.

The spelling of 1211919489646 in words is "one trillion, two hundred eleven billion, nine hundred nineteen million, four hundred eighty-nine thousand, six hundred forty-six".