74809415667520 has 112 divisors (see below), whose sum is σ = 179452860090768. Its totient is φ = 29703250903040.

The previous prime is 74809415667517. The next prime is 74809415667541. The reversal of 74809415667520 is 2576651490847.

It can be written as a sum of positive squares in 8 ways, for example, as 10042459592256 + 64766956075264 = 3168984^2 + 8047792^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720370800 + ... + 720474640.

Almost surely, 2^{74809415667520} 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 74809415667520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89726430045384).

74809415667520 is an abundant number, since it is smaller than the sum of its proper divisors (104643444423248).

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

74809415667520 is a wasteful number, since it uses less digits than its factorization.

74809415667520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120428 (or 120418 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 64.

The spelling of 74809415667520 in words is "seventy-four trillion, eight hundred nine billion, four hundred fifteen million, six hundred sixty-seven thousand, five hundred twenty".