126621657052 has 24 divisors (see below), whose sum is σ = 241815087360. Its totient is φ = 57535576560.

The previous prime is 126621657049. The next prime is 126621657103. The reversal of 126621657052 is 250756126621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362802 + ... + 620377.

It is an arithmetic number, because the mean of its divisors is an integer number (10075628640).

Almost surely, 2^126621657052 is an apocalyptic number.

It is an amenable number.

126621657052 is a deficient number, since it is larger than the sum of its proper divisors (115193430308).

126621657052 is a wasteful number, since it uses less digits than its factorization.

126621657052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986121 (or 986119 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 126621657052 in words is "one hundred twenty-six billion, six hundred twenty-one million, six hundred fifty-seven thousand, fifty-two".