5551117920 has 480 divisors, whose sum is σ = 20777492736. Its totient is φ = 1393459200.

The previous prime is 5551117841. The next prime is 5551117927. The reversal of 5551117920 is 297111555.

5551117920 is a `hidden beast` number, since 5 + 551 + 1 + 17 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551117927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 16471992 + ... + 16472328.

Almost surely, 2^5551117920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5551117920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10388746368).

5551117920 is an abundant number, since it is smaller than the sum of its proper divisors (15226374816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5551117920 is a wasteful number, since it uses less digits than its factorization.

5551117920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 36.

The square root of 5551117920 is about 74505.8247387411. The cubic root of 5551117920 is about 1770.6259205445.

The spelling of 5551117920 in words is "five billion, five hundred fifty-one million, one hundred seventeen thousand, nine hundred twenty".