78283229430640 has 40 divisors (see below), whose sum is σ = 196009162923168. Its totient is φ = 28904577020160.

The previous prime is 78283229430617. The next prime is 78283229430649. The reversal of 78283229430640 is 4603492238287.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×78283229430640² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78283229430649) 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, 37636166956 + ... + 37636169035.

Almost surely, 2^{78283229430640} is an apocalyptic number.

It is an amenable number.

78283229430640 is an abundant number, since it is smaller than the sum of its proper divisors (117725933492528).

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

78283229430640 is a wasteful number, since it uses less digits than its factorization.

78283229430640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75272336017 (or 75272336011 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 58.

The spelling of 78283229430640 in words is "seventy-eight trillion, two hundred eighty-three billion, two hundred twenty-nine million, four hundred thirty thousand, six hundred forty".