400923304991 has 16 divisors (see below), whose sum is σ = 463118728608. Its totient is φ = 343021056000.

The previous prime is 400923304981. The next prime is 400923305011. The reversal of 400923304991 is 199403329004.

It is a cyclic number.

It is not a de Polignac number, because 400923304991 - 2¹⁴ = 400923288607 is a prime.

It is a super-3 number, since 3×400923304991³ (a number of 36 digits) contains 333 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 (400923304931) 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 15 ways as a sum of consecutive naturals, for example, 7639541 + ... + 7691841.

It is an arithmetic number, because the mean of its divisors is an integer number (28944920538).

Almost surely, 2^400923304991 is an apocalyptic number.

400923304991 is a deficient number, since it is larger than the sum of its proper divisors (62195423617).

400923304991 is a wasteful number, since it uses less digits than its factorization.

400923304991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93322.

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 400923304991 in words is "four hundred billion, nine hundred twenty-three million, three hundred four thousand, nine hundred ninety-one".