1621116527638 has 8 divisors (see below), whose sum is σ = 2431682611200. Its totient is φ = 810555657240.

The previous prime is 1621116527561. The next prime is 1621116527669. The reversal of 1621116527638 is 8367256111261.

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

It is a junction number, because it is equal to n+sod(n) for n = 1621116527591 and 1621116527600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400918 + ... + 1844713.

It is an arithmetic number, because the mean of its divisors is an integer number (303960326400).

Almost surely, 2^{1621116527638} is an apocalyptic number.

1621116527638 is a deficient number, since it is larger than the sum of its proper divisors (810566083562).

1621116527638 is a wasteful number, since it uses less digits than its factorization.

1621116527638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606582.

The product of its digits is 725760, while the sum is 49.

The spelling of 1621116527638 in words is "one trillion, six hundred twenty-one billion, one hundred sixteen million, five hundred twenty-seven thousand, six hundred thirty-eight".