70278865920 has 616 divisors, whose sum is σ = 266336643840. Its totient is φ = 17736744960.

The previous prime is 70278865889. The next prime is 70278865999. The reversal of 70278865920 is 2956887207.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 70916625 + ... + 70917615.

Almost surely, 2^70278865920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70278865920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133168321920).

70278865920 is an abundant number, since it is smaller than the sum of its proper divisors (196057777920).

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

70278865920 is an equidigital number, since it uses as much as digits as its factorization.

70278865920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 70278865920 in words is "seventy billion, two hundred seventy-eight million, eight hundred sixty-five thousand, nine hundred twenty".