400937534621 has 8 divisors (see below), whose sum is σ = 440965668864. Its totient is φ = 362221798320.

The previous prime is 400937534563. The next prime is 400937534623. The reversal of 400937534621 is 126435739004.

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 400937534621 - 2¹⁴ = 400937518237 is a prime.

It is a super-2 number, since 2×400937534621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400937534623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328098845 + ... + 328100066.

It is an arithmetic number, because the mean of its divisors is an integer number (55120708608).

Almost surely, 2^400937534621 is an apocalyptic number.

It is an amenable number.

400937534621 is a deficient number, since it is larger than the sum of its proper divisors (40028134243).

400937534621 is a wasteful number, since it uses less digits than its factorization.

400937534621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656198971.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 400937534621 in words is "four hundred billion, nine hundred thirty-seven million, five hundred thirty-four thousand, six hundred twenty-one".