78477750340 has 48 divisors (see below), whose sum is σ = 179826454080. Its totient is φ = 28530846080.

The previous prime is 78477750331. The next prime is 78477750353. The reversal of 78477750340 is 4305777487.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 983046 + ... + 1059874.

It is an arithmetic number, because the mean of its divisors is an integer number (3746384460).

Almost surely, 2^78477750340 is an apocalyptic number.

It is an amenable number.

78477750340 is an abundant number, since it is smaller than the sum of its proper divisors (101348703740).

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

78477750340 is a wasteful number, since it uses less digits than its factorization.

78477750340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81492 (or 81490 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 52.

The spelling of 78477750340 in words is "seventy-eight billion, four hundred seventy-seven million, seven hundred fifty thousand, three hundred forty".