978890306653 has 12 divisors (see below), whose sum is σ = 1166482528092. Its totient is φ = 818584226880.

The previous prime is 978890306617. The next prime is 978890306657. The reversal of 978890306653 is 356603098879.

It can be written as a sum of positive squares in 2 ways, for example, as 551197850329 + 427692456324 = 742427^2 + 653982^2 .

It is not a de Polignac number, because 978890306653 - 2¹⁷ = 978890175581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978890306657) 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, 243624250 + ... + 243628267.

It is an arithmetic number, because the mean of its divisors is an integer number (97206877341).

Almost surely, 2^978890306653 is an apocalyptic number.

It is an amenable number.

978890306653 is a deficient number, since it is larger than the sum of its proper divisors (187592221439).

978890306653 is a wasteful number, since it uses less digits than its factorization.

978890306653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487252572 (or 487252565 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 64.

The spelling of 978890306653 in words is "nine hundred seventy-eight billion, eight hundred ninety million, three hundred six thousand, six hundred fifty-three".