201501601671 has 8 divisors (see below), whose sum is σ = 269783611504. Its totient is φ = 133776996480.

The previous prime is 201501601667. The next prime is 201501601747. The reversal of 201501601671 is 176106105102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201501601671 - 2² = 201501601667 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 (201501601271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139350316 + ... + 139351761.

It is an arithmetic number, because the mean of its divisors is an integer number (33722951438).

Almost surely, 2^201501601671 is an apocalyptic number.

201501601671 is a deficient number, since it is larger than the sum of its proper divisors (68282009833).

201501601671 is a wasteful number, since it uses less digits than its factorization.

201501601671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278702321.

The product of its (nonzero) digits is 2520, while the sum is 30.

Adding to 201501601671 its reverse (176106105102), we get a palindrome (377607706773).

The spelling of 201501601671 in words is "two hundred one billion, five hundred one million, six hundred one thousand, six hundred seventy-one".