1626121616725 has 12 divisors (see below), whose sum is σ = 2017636309440. Its totient is φ = 1300093742000.

The previous prime is 1626121616687. The next prime is 1626121616747. The reversal of 1626121616725 is 5276161216261.

It is a de Polignac number, because none of the positive numbers 2^k-1626121616725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20047501 + ... + 20128450.

It is an arithmetic number, because the mean of its divisors is an integer number (168136359120).

Almost surely, 2^{1626121616725} is an apocalyptic number.

It is an amenable number.

1626121616725 is a deficient number, since it is larger than the sum of its proper divisors (391514692715).

1626121616725 is a wasteful number, since it uses less digits than its factorization.

1626121616725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40177580 (or 40177575 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The spelling of 1626121616725 in words is "one trillion, six hundred twenty-six billion, one hundred twenty-one million, six hundred sixteen thousand, seven hundred twenty-five".