126400721374 has 32 divisors (see below), whose sum is σ = 208598100480. Its totient is φ = 57177137952.

The previous prime is 126400721357. The next prime is 126400721389. The reversal of 126400721374 is 473127004621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417799 + ... + 653725.

It is an arithmetic number, because the mean of its divisors is an integer number (6518690640).

Almost surely, 2^126400721374 is an apocalyptic number.

126400721374 is a deficient number, since it is larger than the sum of its proper divisors (82197379106).

126400721374 is a wasteful number, since it uses less digits than its factorization.

126400721374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236584.

The product of its (nonzero) digits is 56448, while the sum is 37.

Adding to 126400721374 its reverse (473127004621), we get a palindrome (599527725995).

The spelling of 126400721374 in words is "one hundred twenty-six billion, four hundred million, seven hundred twenty-one thousand, three hundred seventy-four".