126388750000 has 80 divisors (see below), whose sum is σ = 306099997632. Its totient is φ = 50555000000.

The previous prime is 126388749979. The next prime is 126388750057. The reversal of 126388750000 is 57883621.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×126388750000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1199445 + ... + 1300555.

Almost surely, 2^126388750000 is an apocalyptic number.

126388750000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126388750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153049998816).

126388750000 is an abundant number, since it is smaller than the sum of its proper divisors (179711247632).

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

126388750000 is an frugal number, since it uses more digits than its factorization.

126388750000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101154 (or 101118 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 126388750000 in words is "one hundred twenty-six billion, three hundred eighty-eight million, seven hundred fifty thousand".