6651401542401 has 24 divisors (see below), whose sum is σ = 11140639502272. Its totient is φ = 3455273527200.

The previous prime is 6651401542349. The next prime is 6651401542463. The reversal of 6651401542401 is 1042451041566.

It is not a de Polignac number, because 6651401542401 - 2²² = 6651397348097 is a prime.

It is a super-2 number, since 2×6651401542401² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6651401542401.

It is not an unprimeable number, because it can be changed into a prime (6651401542481) 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, 1308813190 + ... + 1308818271.

Almost surely, 2^{6651401542401} is an apocalyptic number.

It is an amenable number.

6651401542401 is a deficient number, since it is larger than the sum of its proper divisors (4489237959871).

6651401542401 is a wasteful number, since it uses less digits than its factorization.

6651401542401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617631493 (or 2617631482 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 6651401542401 its reverse (1042451041566), we get a palindrome (7693852583967).

The spelling of 6651401542401 in words is "six trillion, six hundred fifty-one billion, four hundred one million, five hundred forty-two thousand, four hundred one".