78785557760 has 144 divisors (see below), whose sum is σ = 232266228096. Its totient is φ = 24934293504.

The previous prime is 78785557717. The next prime is 78785557777. The reversal of 78785557760 is 6775558787.

It is a super-2 number, since 2×78785557760² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221714 + ... + 454673.

Almost surely, 2^78785557760 is an apocalyptic number.

78785557760 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78785557760 is an abundant number, since it is smaller than the sum of its proper divisors (153480670336).

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

78785557760 is a wasteful number, since it uses less digits than its factorization.

78785557760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676428 (or 676414 counting only the distinct ones).

The product of its (nonzero) digits is 115248000, while the sum is 65.

The spelling of 78785557760 in words is "seventy-eight billion, seven hundred eighty-five million, five hundred fifty-seven thousand, seven hundred sixty".