65001605501 has 16 divisors (see below), whose sum is σ = 80330973696. Its totient is φ = 51322557696.

The previous prime is 65001605483. The next prime is 65001605509. The reversal of 65001605501 is 10550610056.

It is a cyclic number.

It is not a de Polignac number, because 65001605501 - 2⁶ = 65001605437 is a prime.

It is a super-2 number, since 2×65001605501² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65001605509) 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, 5805386 + ... + 5816571.

It is an arithmetic number, because the mean of its divisors is an integer number (5020685856).

Almost surely, 2^65001605501 is an apocalyptic number.

It is an amenable number.

65001605501 is a deficient number, since it is larger than the sum of its proper divisors (15329368195).

65001605501 is a wasteful number, since it uses less digits than its factorization.

65001605501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11622028.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 65001605501 in words is "sixty-five billion, one million, six hundred five thousand, five hundred one".