9951550380 has 48 divisors (see below), whose sum is σ = 30960380640. Its totient is φ = 2653746624.

The previous prime is 9951550373. The next prime is 9951550393. The reversal of 9951550380 is 830551599.

9951550380 is a `hidden beast` number, since 9 + 9 + 515 + 50 + 3 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9213859 + ... + 9214938.

It is an arithmetic number, because the mean of its divisors is an integer number (645007930).

Almost surely, 2^9951550380 is an apocalyptic number.

9951550380 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9951550380 is an abundant number, since it is smaller than the sum of its proper divisors (21008830260).

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

9951550380 is a wasteful number, since it uses less digits than its factorization.

9951550380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18428815 (or 18428807 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The square root of 9951550380 is about 99757.4577663244. The cubic root of 9951550380 is about 2150.9496709609.

The spelling of 9951550380 in words is "nine billion, nine hundred fifty-one million, five hundred fifty thousand, three hundred eighty".