70728364784 has 60 divisors (see below), whose sum is σ = 173901255768. Its totient is φ = 27556502400.

The previous prime is 70728364753. The next prime is 70728364787. The reversal of 70728364784 is 48746382707.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70728364787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4092047 + ... + 4109294.

Almost surely, 2^70728364784 is an apocalyptic number.

It is an amenable number.

70728364784 is an abundant number, since it is smaller than the sum of its proper divisors (103172890984).

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

70728364784 is a wasteful number, since it uses less digits than its factorization.

70728364784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8201374 (or 8201361 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 56.

The spelling of 70728364784 in words is "seventy billion, seven hundred twenty-eight million, three hundred sixty-four thousand, seven hundred eighty-four".