2781557761983 has 32 divisors (see below), whose sum is σ = 4979571942912. Its totient is φ = 1333813910400.

The previous prime is 2781557761949. The next prime is 2781557762003. The reversal of 2781557761983 is 3891677551872.

It is not a de Polignac number, because 2781557761983 - 2¹² = 2781557757887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781557762983) 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 31 ways as a sum of consecutive naturals, for example, 463126828 + ... + 463132833.

It is an arithmetic number, because the mean of its divisors is an integer number (155611623216).

Almost surely, 2^{2781557761983} is an apocalyptic number.

2781557761983 is a deficient number, since it is larger than the sum of its proper divisors (2198014180929).

2781557761983 is a wasteful number, since it uses less digits than its factorization.

2781557761983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926259695.

The product of its digits is 177811200, while the sum is 69.

The spelling of 2781557761983 in words is "two trillion, seven hundred eighty-one billion, five hundred fifty-seven million, seven hundred sixty-one thousand, nine hundred eighty-three".