165501001001501 has 24 divisors (see below), whose sum is σ = 195941988617760. Its totient is φ = 139221939114720.

The previous prime is 165501001001383. The next prime is 165501001001507. The reversal of 165501001001501 is 105100100105561.

It is not a de Polignac number, because 165501001001501 - 2⁴² = 161102954490397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165501001001507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 836973890 + ... + 837171603.

It is an arithmetic number, because the mean of its divisors is an integer number (8164249525740).

Almost surely, 2^{165501001001501} is an apocalyptic number.

165501001001501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165501001001501 is a deficient number, since it is larger than the sum of its proper divisors (30440987616259).

165501001001501 is a wasteful number, since it uses less digits than its factorization.

165501001001501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674145577 (or 1674145566 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 165501001001501 in words is "one hundred sixty-five trillion, five hundred one billion, one million, one thousand, five hundred one".