4378430553561 has 24 divisors (see below), whose sum is σ = 6723890087616. Its totient is φ = 2739362614560.

The previous prime is 4378430553533. The next prime is 4378430553569. The reversal of 4378430553561 is 1653550348734.

4378430553561 is a `hidden beast` number, since 4 + 3 + 7 + 8 + 4 + 30 + 553 + 56 + 1 = 666.

It is not a de Polignac number, because 4378430553561 - 2¹⁷ = 4378430422489 is a prime.

It is a super-2 number, since 2×4378430553561² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4378430553498 and 4378430553507.

It is not an unprimeable number, because it can be changed into a prime (4378430553569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199534675 + ... + 199556616.

It is an arithmetic number, because the mean of its divisors is an integer number (280162086984).

Almost surely, 2^{4378430553561} is an apocalyptic number.

It is an amenable number.

4378430553561 is a deficient number, since it is larger than the sum of its proper divisors (2345459534055).

4378430553561 is a wasteful number, since it uses less digits than its factorization.

4378430553561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399091373 (or 399091370 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 54.

The spelling of 4378430553561 in words is "four trillion, three hundred seventy-eight billion, four hundred thirty million, five hundred fifty-three thousand, five hundred sixty-one".