6401121512045 has 8 divisors (see below), whose sum is σ = 8272218569496. Its totient is φ = 4726982039616.

The previous prime is 6401121512021. The next prime is 6401121512063. The reversal of 6401121512045 is 5402151211046.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 371159974441 + 6029961537604 = 609229^2 + 2455598^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6401121512045 - 2¹⁴ = 6401121495661 is a prime.

It is a super-2 number, since 2×6401121512045² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49239396182 + ... + 49239396311.

It is an arithmetic number, because the mean of its divisors is an integer number (1034027321187).

Almost surely, 2^{6401121512045} is an apocalyptic number.

6401121512045 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6401121512045 is a deficient number, since it is larger than the sum of its proper divisors (1871097057451).

6401121512045 is a wasteful number, since it uses less digits than its factorization.

6401121512045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98478792511.

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 6401121512045 in words is "six trillion, four hundred one billion, one hundred twenty-one million, five hundred twelve thousand, forty-five".