978794781270 has 16 divisors (see below), whose sum is σ = 2349107475120. Its totient is φ = 261011941664.

The previous prime is 978794781253. The next prime is 978794781271. The reversal of 978794781270 is 72187497879.

It is a junction number, because it is equal to n+sod(n) for n = 978794781195 and 978794781204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978794781271) 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, 16313246325 + ... + 16313246384.

It is an arithmetic number, because the mean of its divisors is an integer number (146819217195).

Almost surely, 2^978794781270 is an apocalyptic number.

978794781270 is an abundant number, since it is smaller than the sum of its proper divisors (1370312693850).

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

978794781270 is a wasteful number, since it uses less digits than its factorization.

978794781270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32626492719.

The product of its (nonzero) digits is 99574272, while the sum is 69.

The spelling of 978794781270 in words is "nine hundred seventy-eight billion, seven hundred ninety-four million, seven hundred eighty-one thousand, two hundred seventy".