126980535920 has 80 divisors (see below), whose sum is σ = 348289517568. Its totient is φ = 42131784960.

The previous prime is 126980535887. The next prime is 126980535923. The reversal of 126980535920 is 29535089621.

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

It is a super-2 number, since 2×126980535920² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126980535923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3639914 + ... + 3674633.

Almost surely, 2^126980535920 is an apocalyptic number.

126980535920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126980535920 is an abundant number, since it is smaller than the sum of its proper divisors (221308981648).

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

126980535920 is a wasteful number, since it uses less digits than its factorization.

126980535920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314598 (or 7314592 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 126980535920 in words is "one hundred twenty-six billion, nine hundred eighty million, five hundred thirty-five thousand, nine hundred twenty".