126765221607 has 24 divisors (see below), whose sum is σ = 192110525568. Its totient is φ = 80443281600.

The previous prime is 126765221537. The next prime is 126765221617. The reversal of 126765221607 is 706122567621.

126765221607 is a `hidden beast` number, since 1 + 2 + 67 + 6 + 522 + 1 + 60 + 7 = 666.

It is not a de Polignac number, because 126765221607 - 2⁸ = 126765221351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126765221617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3707208 + ... + 3741245.

It is an arithmetic number, because the mean of its divisors is an integer number (8004605232).

Almost surely, 2^126765221607 is an apocalyptic number.

126765221607 is a deficient number, since it is larger than the sum of its proper divisors (65345303961).

126765221607 is a wasteful number, since it uses less digits than its factorization.

126765221607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7448551 (or 7448548 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 126765221607 in words is "one hundred twenty-six billion, seven hundred sixty-five million, two hundred twenty-one thousand, six hundred seven".