126461751549 has 32 divisors (see below), whose sum is σ = 198345451776. Its totient is φ = 70156730880.

The previous prime is 126461751547. The next prime is 126461751569. The reversal of 126461751549 is 945157164621.

It is a happy number.

It is not a de Polignac number, because 126461751549 - 2¹ = 126461751547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126461751541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177019 + ... + 533159.

It is an arithmetic number, because the mean of its divisors is an integer number (6198295368).

Almost surely, 2^126461751549 is an apocalyptic number.

It is an amenable number.

126461751549 is a deficient number, since it is larger than the sum of its proper divisors (71883700227).

126461751549 is a wasteful number, since it uses less digits than its factorization.

126461751549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356645.

The product of its digits is 1814400, while the sum is 51.

The spelling of 126461751549 in words is "one hundred twenty-six billion, four hundred sixty-one million, seven hundred fifty-one thousand, five hundred forty-nine".