10261557138 has 16 divisors (see below), whose sum is σ = 23454987840. Its totient is φ = 2931873456.

The previous prime is 10261557091. The next prime is 10261557143. The reversal of 10261557138 is 83175516201.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10261557096 and 10261557105.

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, 122161353 + ... + 122161436.

It is an arithmetic number, because the mean of its divisors is an integer number (1465936740).

Almost surely, 2^10261557138 is an apocalyptic number.

10261557138 is an abundant number, since it is smaller than the sum of its proper divisors (13193430702).

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

10261557138 is a wasteful number, since it uses less digits than its factorization.

10261557138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244322801.

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 10261557138 in words is "ten billion, two hundred sixty-one million, five hundred fifty-seven thousand, one hundred thirty-eight".