75216553232478 has 96 divisors (see below), whose sum is σ = 179844398262144. Its totient is φ = 20895516952128.

The previous prime is 75216553232467. The next prime is 75216553232573. The reversal of 75216553232478 is 87423235561257.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13800801 + ... + 18463347.

It is an arithmetic number, because the mean of its divisors is an integer number (1873379148564).

Almost surely, 2^{75216553232478} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75216553232478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89922199131072).

75216553232478 is an abundant number, since it is smaller than the sum of its proper divisors (104627845029666).

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

75216553232478 is a wasteful number, since it uses less digits than its factorization.

75216553232478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664086 (or 4664079 counting only the distinct ones).

The product of its digits is 84672000, while the sum is 60.

The spelling of 75216553232478 in words is "seventy-five trillion, two hundred sixteen billion, five hundred fifty-three million, two hundred thirty-two thousand, four hundred seventy-eight".