126123451651 has 8 divisors (see below), whose sum is σ = 128517483600. Its totient is φ = 123729951072.

The previous prime is 126123451591. The next prime is 126123451687. The reversal of 126123451651 is 156154321621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126123451651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126123451651.

It is not an unprimeable number, because it can be changed into a prime (126123451351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363825 + ... + 620173.

It is an arithmetic number, because the mean of its divisors is an integer number (16064685450).

Almost surely, 2^126123451651 is an apocalyptic number.

126123451651 is a deficient number, since it is larger than the sum of its proper divisors (2394031949).

126123451651 is an equidigital number, since it uses as much as digits as its factorization.

126123451651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265685.

The product of its digits is 43200, while the sum is 37.

The spelling of 126123451651 in words is "one hundred twenty-six billion, one hundred twenty-three million, four hundred fifty-one thousand, six hundred fifty-one".