1213454230644 has 12 divisors (see below), whose sum is σ = 2831393204864. Its totient is φ = 404484743544.

The previous prime is 1213454230631. The next prime is 1213454230663. The reversal of 1213454230644 is 4460324543121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50560592932 + ... + 50560592955.

Almost surely, 2^{1213454230644} is an apocalyptic number.

It is an amenable number.

1213454230644 is an abundant number, since it is smaller than the sum of its proper divisors (1617938974220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213454230644 is a wasteful number, since it uses less digits than its factorization.

1213454230644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101121185894 (or 101121185892 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

Adding to 1213454230644 its reverse (4460324543121), we get a palindrome (5673778773765).

The spelling of 1213454230644 in words is "one trillion, two hundred thirteen billion, four hundred fifty-four million, two hundred thirty thousand, six hundred forty-four".