1401641551309 has 4 divisors (see below), whose sum is σ = 1414500648220. Its totient is φ = 1388782454400.

The previous prime is 1401641551291. The next prime is 1401641551379. The reversal of 1401641551309 is 9031551461041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 519187979209 + 882453572100 = 720547^2 + 939390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401641551309 - 2²³ = 1401633162701 is a prime.

It is a super-2 number, since 2×1401641551309² (a number of 25 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 (1401641551379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6429548292 + ... + 6429548509.

It is an arithmetic number, because the mean of its divisors is an integer number (353625162055).

Almost surely, 2^{1401641551309} is an apocalyptic number.

It is an amenable number.

1401641551309 is a deficient number, since it is larger than the sum of its proper divisors (12859096911).

1401641551309 is a wasteful number, since it uses less digits than its factorization.

1401641551309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12859096910.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 1401641551309 in words is "one trillion, four hundred one billion, six hundred forty-one million, five hundred fifty-one thousand, three hundred nine".