400451022154549 has 2 divisors, whose sum is σ = 400451022154550. Its totient is φ = 400451022154548.

The previous prime is 400451022154517. The next prime is 400451022154559. The reversal of 400451022154549 is 945451220154004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353681057088100 + 46769965066449 = 18806410^2 + 6838857^2 .

It is a cyclic number.

It is not a de Polignac number, because 400451022154549 - 2⁵ = 400451022154517 is a prime.

It is a super-3 number, since 3×400451022154549³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 400451022154499 and 400451022154508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400451022154559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200225511077274 + 200225511077275.

It is an arithmetic number, because the mean of its divisors is an integer number (200225511077275).

Almost surely, 2^{400451022154549} is an apocalyptic number.

It is an amenable number.

400451022154549 is a deficient number, since it is larger than the sum of its proper divisors (1).

400451022154549 is an equidigital number, since it uses as much as digits as its factorization.

400451022154549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152000, while the sum is 46.

The spelling of 400451022154549 in words is "four hundred trillion, four hundred fifty-one billion, twenty-two million, one hundred fifty-four thousand, five hundred forty-nine".