78327528327550 has 48 divisors (see below), whose sum is σ = 148177757779920. Its totient is φ = 30799907959040.

The previous prime is 78327528327541. The next prime is 78327528327641. The reversal of 78327528327550 is 5572382572387.

It is a super-2 number, since 2×78327528327550² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50102092 + ... + 51641791.

It is an arithmetic number, because the mean of its divisors is an integer number (3087036620415).

Almost surely, 2^{78327528327550} is an apocalyptic number.

78327528327550 is a deficient number, since it is larger than the sum of its proper divisors (69850229452370).

78327528327550 is a wasteful number, since it uses less digits than its factorization.

78327528327550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101744157 (or 101744152 counting only the distinct ones).

The product of its (nonzero) digits is 197568000, while the sum is 64.

The spelling of 78327528327550 in words is "seventy-eight trillion, three hundred twenty-seven billion, five hundred twenty-eight million, three hundred twenty-seven thousand, five hundred fifty".