2581651397678 has 8 divisors (see below), whose sum is σ = 3876892694472. Its totient is φ = 1289353832856.

The previous prime is 2581651397609. The next prime is 2581651397683. The reversal of 2581651397678 is 8767931561852.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735930800 + ... + 735934307.

It is an arithmetic number, because the mean of its divisors is an integer number (484611586809).

Almost surely, 2^{2581651397678} is an apocalyptic number.

2581651397678 is a deficient number, since it is larger than the sum of its proper divisors (1295241296794).

2581651397678 is a wasteful number, since it uses less digits than its factorization.

2581651397678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471865986.

The product of its digits is 152409600, while the sum is 68.

The spelling of 2581651397678 in words is "two trillion, five hundred eighty-one billion, six hundred fifty-one million, three hundred ninety-seven thousand, six hundred seventy-eight".