3801521718964 has 6 divisors (see below), whose sum is σ = 6652663008194. Its totient is φ = 1900760859480.

The previous prime is 3801521718961. The next prime is 3801521718971. The reversal of 3801521718964 is 4698171251083.

It can be written as a sum of positive squares in only one way, i.e., 3131838090000 + 669683628964 = 1769700^2 + 818342^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3801521718961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475190214867 + ... + 475190214874.

It is a 1-persistent number, because it is pandigital, but 2⋅3801521718964 = 7603043437928 is not.

Almost surely, 2^{3801521718964} is an apocalyptic number.

It is an amenable number.

3801521718964 is a deficient number, since it is larger than the sum of its proper divisors (2851141289230).

3801521718964 is a wasteful number, since it uses less digits than its factorization.

3801521718964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950380429745 (or 950380429743 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 3801521718964 in words is "three trillion, eight hundred one billion, five hundred twenty-one million, seven hundred eighteen thousand, nine hundred sixty-four".