126515262640 has 40 divisors (see below), whose sum is σ = 316774756368. Its totient is φ = 46713327360.

The previous prime is 126515262637. The next prime is 126515262649. The reversal of 126515262640 is 46262515621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×126515262640² (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 a junction number, because it is equal to n+sod(n) for n = 126515262593 and 126515262602.

It is not an unprimeable number, because it can be changed into a prime (126515262649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60823606 + ... + 60825685.

Almost surely, 2^126515262640 is an apocalyptic number.

126515262640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126515262640 is an abundant number, since it is smaller than the sum of its proper divisors (190259493728).

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

126515262640 is a wasteful number, since it uses less digits than its factorization.

126515262640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121649317 (or 121649311 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 126515262640 in words is "one hundred twenty-six billion, five hundred fifteen million, two hundred sixty-two thousand, six hundred forty".