2051703623621 has 4 divisors (see below), whose sum is σ = 2051807796000. Its totient is φ = 2051599451244.

The previous prime is 2051703623597. The next prime is 2051703623639. The reversal of 2051703623621 is 1263263071502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2051703623621 - 2¹⁴ = 2051703607237 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 (2051703223621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52056641 + ... + 52096038.

It is an arithmetic number, because the mean of its divisors is an integer number (512951949000).

Almost surely, 2^{2051703623621} is an apocalyptic number.

It is an amenable number.

2051703623621 is a deficient number, since it is larger than the sum of its proper divisors (104172379).

2051703623621 is a wasteful number, since it uses less digits than its factorization.

2051703623621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104172378.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 2051703623621 in words is "two trillion, fifty-one billion, seven hundred three million, six hundred twenty-three thousand, six hundred twenty-one".