10261123456 has 16 divisors (see below), whose sum is σ = 20442082140. Its totient is φ = 5130561664.

The previous prime is 10261123427. The next prime is 10261123553. The reversal of 10261123456 is 65432116201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40082386 + ... + 40082641.

Almost surely, 2^10261123456 is an apocalyptic number.

10261123456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10261123456 is a deficient number, since it is larger than the sum of its proper divisors (10180958684).

10261123456 is an frugal number, since it uses more digits than its factorization.

10261123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80165041 (or 80165029 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 10261123456 its reverse (65432116201), we get a palindrome (75693239657).

The spelling of 10261123456 in words is "ten billion, two hundred sixty-one million, one hundred twenty-three thousand, four hundred fifty-six".