7781199480 has 96 divisors (see below), whose sum is σ = 25394990400. Its totient is φ = 2066281728.

The previous prime is 7781199469. The next prime is 7781199509. The reversal of 7781199480 is 849911877.

7781199480 is a `hidden beast` number, since 7 + 78 + 1 + 1 + 99 + 480 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40822 + ... + 131258.

It is an arithmetic number, because the mean of its divisors is an integer number (264531150).

Almost surely, 2^7781199480 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 7781199480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12697495200).

7781199480 is an abundant number, since it is smaller than the sum of its proper divisors (17613790920).

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

7781199480 is a wasteful number, since it uses less digits than its factorization.

7781199480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90693 (or 90686 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The square root of 7781199480 is about 88211.1074638563. The cubic root of 7781199480 is about 1981.5978225760.

The spelling of 7781199480 in words is "seven billion, seven hundred eighty-one million, one hundred ninety-nine thousand, four hundred eighty".