74478811788557 has 8 divisors (see below), whose sum is σ = 81250211010432. Its totient is φ = 67707512258400.

The previous prime is 74478811788517. The next prime is 74478811788643. The reversal of 74478811788557 is 75588711887447.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74478811788557 - 2¹⁴ = 74478811772173 is a prime.

It is a super-2 number, since 2×74478811788557² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74478811788517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23356544 + ... + 26353097.

It is an arithmetic number, because the mean of its divisors is an integer number (10156276376304).

Almost surely, 2^{74478811788557} is an apocalyptic number.

It is an amenable number.

74478811788557 is a deficient number, since it is larger than the sum of its proper divisors (6771399221875).

74478811788557 is a wasteful number, since it uses less digits than its factorization.

74478811788557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49845859.

The product of its digits is 3933798400, while the sum is 80.

The spelling of 74478811788557 in words is "seventy-four trillion, four hundred seventy-eight billion, eight hundred eleven million, seven hundred eighty-eight thousand, five hundred fifty-seven".