2051720066552 has 64 divisors (see below), whose sum is σ = 4173479069760. Its totient is φ = 939982694400.

The previous prime is 2051720066527. The next prime is 2051720066621. The reversal of 2051720066552 is 2556600271502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7663298 + ... + 7926510.

It is an arithmetic number, because the mean of its divisors is an integer number (65210610465).

Almost surely, 2^{2051720066552} is an apocalyptic number.

It is an amenable number.

2051720066552 is an abundant number, since it is smaller than the sum of its proper divisors (2121759003208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2051720066552 is a wasteful number, since it uses less digits than its factorization.

2051720066552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263784 (or 263780 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 2051720066552 in words is "two trillion, fifty-one billion, seven hundred twenty million, sixty-six thousand, five hundred fifty-two".