126520712540 has 12 divisors (see below), whose sum is σ = 265693496376. Its totient is φ = 50608285008.

The previous prime is 126520712537. The next prime is 126520712567. The reversal of 126520712540 is 45217025621.

It is a self number, because there is not a number n which added to its sum of digits gives 126520712540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3163017794 + ... + 3163017833.

It is an arithmetic number, because the mean of its divisors is an integer number (22141124698).

Almost surely, 2^126520712540 is an apocalyptic number.

126520712540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126520712540 is an abundant number, since it is smaller than the sum of its proper divisors (139172783836).

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

126520712540 is a wasteful number, since it uses less digits than its factorization.

126520712540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326035636 (or 6326035634 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 126520712540 in words is "one hundred twenty-six billion, five hundred twenty million, seven hundred twelve thousand, five hundred forty".