78286758550 has 288 divisors, whose sum is σ = 201792021984. Its totient is φ = 22208256000.

The previous prime is 78286758523. The next prime is 78286758577. The reversal of 78286758550 is 5585768287.

It is an interprime number because it is at equal distance from previous prime (78286758523) and next prime (78286758577).

It is a super-2 number, since 2×78286758550² (a number of 23 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 143 ways as a sum of consecutive naturals, for example, 25574020 + ... + 25577080.

It is an arithmetic number, because the mean of its divisors is an integer number (700666743).

Almost surely, 2^78286758550 is an apocalyptic number.

78286758550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78286758550 is an abundant number, since it is smaller than the sum of its proper divisors (123505263434).

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

78286758550 is a wasteful number, since it uses less digits than its factorization.

78286758550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3172 counting only the distinct ones).

The product of its (nonzero) digits is 37632000, while the sum is 61.

The spelling of 78286758550 in words is "seventy-eight billion, two hundred eighty-six million, seven hundred fifty-eight thousand, five hundred fifty".