78355747460 has 12 divisors (see below), whose sum is σ = 164547069708. Its totient is φ = 31342298976.

The previous prime is 78355747447. The next prime is 78355747493. The reversal of 78355747460 is 6474755387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23685825604 + 54669921856 = 153902^2 + 233816^2 .

It is a super-2 number, since 2×78355747460² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78355747396 and 78355747405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958893667 + ... + 1958893706.

It is an arithmetic number, because the mean of its divisors is an integer number (13712255809).

Almost surely, 2^78355747460 is an apocalyptic number.

It is an amenable number.

78355747460 is an abundant number, since it is smaller than the sum of its proper divisors (86191322248).

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

78355747460 is a wasteful number, since it uses less digits than its factorization.

78355747460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917787382 (or 3917787380 counting only the distinct ones).

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 78355747460 in words is "seventy-eight billion, three hundred fifty-five million, seven hundred forty-seven thousand, four hundred sixty".