1964904317651 has 16 divisors (see below), whose sum is σ = 2182655205888. Its totient is φ = 1753781047200.

The previous prime is 1964904317633. The next prime is 1964904317659. The reversal of 1964904317651 is 1567134094691.

It is a cyclic number.

It is not a de Polignac number, because 1964904317651 - 2³⁰ = 1963830575827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964904317659) 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, 2309675 + ... + 3043748.

It is an arithmetic number, because the mean of its divisors is an integer number (136415950368).

Almost surely, 2^{1964904317651} is an apocalyptic number.

1964904317651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1964904317651 is a deficient number, since it is larger than the sum of its proper divisors (217750888237).

1964904317651 is a wasteful number, since it uses less digits than its factorization.

1964904317651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5354042.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 1964904317651 in words is "one trillion, nine hundred sixty-four billion, nine hundred four million, three hundred seventeen thousand, six hundred fifty-one".