978540976852 has 24 divisors (see below), whose sum is σ = 1713931871400. Its totient is φ = 488846324736.

The previous prime is 978540976837. The next prime is 978540976867. The reversal of 978540976852 is 258679045879.

It is an interprime number because it is at equal distance from previous prime (978540976837) and next prime (978540976867).

It can be written as a sum of positive squares in 4 ways, for example, as 56856494916 + 921684481936 = 238446^2 + 960044^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26840428 + ... + 26876860.

It is an arithmetic number, because the mean of its divisors is an integer number (71413827975).

Almost surely, 2^978540976852 is an apocalyptic number.

It is an amenable number.

978540976852 is a deficient number, since it is larger than the sum of its proper divisors (735390894548).

978540976852 is a wasteful number, since it uses less digits than its factorization.

978540976852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42075 (or 42073 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 70.

The spelling of 978540976852 in words is "nine hundred seventy-eight billion, five hundred forty million, nine hundred seventy-six thousand, eight hundred fifty-two".