2505764787644 has 24 divisors (see below), whose sum is σ = 4405162286448. Its totient is φ = 1247152896000.

The previous prime is 2505764787641. The next prime is 2505764787649. The reversal of 2505764787644 is 4467874675052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505764787641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962684 + ... + 2436860.

It is an arithmetic number, because the mean of its divisors is an integer number (183548428602).

Almost surely, 2^{2505764787644} is an apocalyptic number.

It is an amenable number.

2505764787644 is a deficient number, since it is larger than the sum of its proper divisors (1899397498804).

2505764787644 is a wasteful number, since it uses less digits than its factorization.

2505764787644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476125 (or 1476123 counting only the distinct ones).

The product of its (nonzero) digits is 316108800, while the sum is 65.

The spelling of 2505764787644 in words is "two trillion, five hundred five billion, seven hundred sixty-four million, seven hundred eighty-seven thousand, six hundred forty-four".