1234211563640 has 64 divisors (see below), whose sum is σ = 3032016693120. Its totient is φ = 448420752000.

The previous prime is 1234211563603. The next prime is 1234211563687. The reversal of 1234211563640 is 463651124321.

It is a junction number, because it is equal to n+sod(n) for n = 1234211563594 and 1234211563603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682466 + ... + 1712945.

It is an arithmetic number, because the mean of its divisors is an integer number (47375260830).

Almost surely, 2^{1234211563640} is an apocalyptic number.

1234211563640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1234211563640 is an abundant number, since it is smaller than the sum of its proper divisors (1797805129480).

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

1234211563640 is a wasteful number, since it uses less digits than its factorization.

1234211563640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396604 (or 2396600 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 1234211563640 its reverse (463651124321), we get a palindrome (1697862687961).

The spelling of 1234211563640 in words is "one trillion, two hundred thirty-four billion, two hundred eleven million, five hundred sixty-three thousand, six hundred forty".