9774081540 has 48 divisors (see below), whose sum is σ = 30408255360. Its totient is φ = 2606421600.

The previous prime is 9774081533. The next prime is 9774081563. The reversal of 9774081540 is 451804779.

It is a happy number.

9774081540 is a `hidden beast` number, since 97 + 7 + 408 + 154 + 0 = 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, 9049536 + ... + 9050615.

It is an arithmetic number, because the mean of its divisors is an integer number (633505320).

Almost surely, 2^9774081540 is an apocalyptic number.

9774081540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9774081540 is an abundant number, since it is smaller than the sum of its proper divisors (20634173820).

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

9774081540 is a wasteful number, since it uses less digits than its factorization.

9774081540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18100169 (or 18100161 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 9774081540 is about 98863.9547054436. The cubic root of 9774081540 is about 2138.0867358198.

The spelling of 9774081540 in words is "nine billion, seven hundred seventy-four million, eighty-one thousand, five hundred forty".