1234567901816 has 8 divisors (see below), whose sum is σ = 2314814815920. Its totient is φ = 617283950904.

The previous prime is 1234567901803. The next prime is 1234567901857. The reversal of 1234567901816 is 6181097654321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77160493856 + ... + 77160493871.

It is an arithmetic number, because the mean of its divisors is an integer number (289351851990).

It is a 1-persistent number, because it is pandigital, but 2⋅1234567901816 = 2469135803632 is not.

Almost surely, 2^{1234567901816} is an apocalyptic number.

It is an amenable number.

1234567901816 is a deficient number, since it is larger than the sum of its proper divisors (1080246914104).

1234567901816 is a wasteful number, since it uses less digits than its factorization.

1234567901816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154320987733 (or 154320987729 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 1234567901816 in words is "one trillion, two hundred thirty-four billion, five hundred sixty-seven million, nine hundred one thousand, eight hundred sixteen".