126081625591 has 4 divisors (see below), whose sum is σ = 126111443400. Its totient is φ = 126051807784.

The previous prime is 126081625577. The next prime is 126081625597. The reversal of 126081625591 is 195526180621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126081625591 - 2¹³ = 126081617399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126081625597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14902561 + ... + 14911018.

It is an arithmetic number, because the mean of its divisors is an integer number (31527860850).

Almost surely, 2^126081625591 is an apocalyptic number.

126081625591 is a deficient number, since it is larger than the sum of its proper divisors (29817809).

126081625591 is an equidigital number, since it uses as much as digits as its factorization.

126081625591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29817808.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 126081625591 in words is "one hundred twenty-six billion, eighty-one million, six hundred twenty-five thousand, five hundred ninety-one".