9554358981 has 16 divisors (see below), whose sum is σ = 13444669440. Its totient is φ = 6018562800.

The previous prime is 9554358973. The next prime is 9554359049. The reversal of 9554358981 is 1898534559.

It is a happy number.

It is not a de Polignac number, because 9554358981 - 2³ = 9554358973 is a prime.

It is a super-2 number, since 2×9554358981² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9554358901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196995 + ... + 240656.

It is an arithmetic number, because the mean of its divisors is an integer number (840291840).

Almost surely, 2^9554358981 is an apocalyptic number.

It is an amenable number.

9554358981 is a deficient number, since it is larger than the sum of its proper divisors (3890310459).

9554358981 is a wasteful number, since it uses less digits than its factorization.

9554358981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438056.

The product of its digits is 7776000, while the sum is 57.

The square root of 9554358981 is about 97746.4013710991. The cubic root of 9554358981 is about 2121.9436740841.

The spelling of 9554358981 in words is "nine billion, five hundred fifty-four million, three hundred fifty-eight thousand, nine hundred eighty-one".