77482475520 has 240 divisors, whose sum is σ = 254667221088. Its totient is φ = 20101201920.

The previous prime is 77482475519. The next prime is 77482475533. The reversal of 77482475520 is 2557428477.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

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, 9088860 + ... + 9097380.

Almost surely, 2^77482475520 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 77482475520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127333610544).

77482475520 is an abundant number, since it is smaller than the sum of its proper divisors (177184745568).

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

77482475520 is an equidigital number, since it uses as much as digits as its factorization.

77482475520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8594 (or 8568 counting only the distinct ones).

The product of its (nonzero) digits is 4390400, while the sum is 51.

The spelling of 77482475520 in words is "seventy-seven billion, four hundred eighty-two million, four hundred seventy-five thousand, five hundred twenty".