645514163711 has 16 divisors (see below), whose sum is σ = 693185558400. Its totient is φ = 599277873888.

The previous prime is 645514163689. The next prime is 645514163741. The reversal of 645514163711 is 117361415546.

It is a cyclic number.

It is not a de Polignac number, because 645514163711 - 2¹⁰ = 645514162687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645514163741) 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, 552905 + ... + 1263618.

It is an arithmetic number, because the mean of its divisors is an integer number (43324097400).

Almost surely, 2^645514163711 is an apocalyptic number.

645514163711 is a deficient number, since it is larger than the sum of its proper divisors (47671394689).

645514163711 is a wasteful number, since it uses less digits than its factorization.

645514163711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816918.

The product of its digits is 302400, while the sum is 44.

The spelling of 645514163711 in words is "six hundred forty-five billion, five hundred fourteen million, one hundred sixty-three thousand, seven hundred eleven".