125002801780 has 12 divisors (see below), whose sum is σ = 262505883780. Its totient is φ = 50001120704.

The previous prime is 125002801741. The next prime is 125002801783. The reversal of 125002801780 is 87108200521.

It can be written as a sum of positive squares in 2 ways, for example, as 43569047824 + 81433753956 = 208732^2 + 285366^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125002801783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3125070025 + ... + 3125070064.

It is an arithmetic number, because the mean of its divisors is an integer number (21875490315).

Almost surely, 2^125002801780 is an apocalyptic number.

125002801780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125002801780 is an abundant number, since it is smaller than the sum of its proper divisors (137503082000).

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

125002801780 is a wasteful number, since it uses less digits than its factorization.

125002801780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6250140098 (or 6250140096 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The spelling of 125002801780 in words is "one hundred twenty-five billion, two million, eight hundred one thousand, seven hundred eighty".