126642001951 has 2 divisors, whose sum is σ = 126642001952. Its totient is φ = 126642001950.

The previous prime is 126642001943. The next prime is 126642001987. The reversal of 126642001951 is 159100246621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126642001951 - 2³ = 126642001943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126642001951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126642001151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63321000975 + 63321000976.

It is an arithmetic number, because the mean of its divisors is an integer number (63321000976).

Almost surely, 2^126642001951 is an apocalyptic number.

126642001951 is a deficient number, since it is larger than the sum of its proper divisors (1).

126642001951 is an equidigital number, since it uses as much as digits as its factorization.

126642001951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 126642001951 in words is "one hundred twenty-six billion, six hundred forty-two million, one thousand, nine hundred fifty-one".