65001155664 has 160 divisors (see below), whose sum is σ = 191139194880. Its totient is φ = 18907969536.

The previous prime is 65001155657. The next prime is 65001155671. The reversal of 65001155664 is 46655110056.

65001155664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65001155657) and next prime (65001155671).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 684087 + ... + 773289.

It is an arithmetic number, because the mean of its divisors is an integer number (1194619968).

Almost surely, 2^65001155664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65001155664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95569597440).

65001155664 is an abundant number, since it is smaller than the sum of its proper divisors (126138039216).

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

65001155664 is a wasteful number, since it uses less digits than its factorization.

65001155664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89297 (or 89291 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 65001155664 in words is "sixty-five billion, one million, one hundred fifty-five thousand, six hundred sixty-four".