1265138750100 has 36 divisors (see below), whose sum is σ = 3660468117824. Its totient is φ = 337370333280.

The previous prime is 1265138750093. The next prime is 1265138750101. The reversal of 1265138750100 is 10578315621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265138750101) 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, 2108564284 + ... + 2108564883.

Almost surely, 2^{1265138750100} is an apocalyptic number.

1265138750100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265138750100 is an abundant number, since it is smaller than the sum of its proper divisors (2395329367724).

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

1265138750100 is a wasteful number, since it uses less digits than its factorization.

1265138750100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217129184 (or 4217129177 counting only the distinct ones).

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

The spelling of 1265138750100 in words is "one trillion, two hundred sixty-five billion, one hundred thirty-eight million, seven hundred fifty thousand, one hundred".