10653261978 has 16 divisors (see below), whose sum is σ = 21826195776. Its totient is φ = 3464475360.

The previous prime is 10653261967. The next prime is 10653262001. The reversal of 10653261978 is 87916235601.

It is a super-2 number, since 2×10653261978² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 21652726 + ... + 21653217.

It is an arithmetic number, because the mean of its divisors is an integer number (1364137236).

Almost surely, 2^10653261978 is an apocalyptic number.

10653261978 is an abundant number, since it is smaller than the sum of its proper divisors (11172933798).

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

10653261978 is a wasteful number, since it uses less digits than its factorization.

10653261978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43305989.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 10653261978 in words is "ten billion, six hundred fifty-three million, two hundred sixty-one thousand, nine hundred seventy-eight".