740394256493 has 4 divisors (see below), whose sum is σ = 740973143040. Its totient is φ = 739815369948.

The previous prime is 740394256477. The next prime is 740394256519. The reversal of 740394256493 is 394652493047.

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, and also an emirpimes, since its reverse is a distinct semiprime: 394652493047 = 5443 ⋅72506429.

It is a cyclic number.

It is not a de Polignac number, because 740394256493 - 2⁴ = 740394256477 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 (740394258493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289441355 + ... + 289443912.

It is an arithmetic number, because the mean of its divisors is an integer number (185243285760).

Almost surely, 2^740394256493 is an apocalyptic number.

It is an amenable number.

740394256493 is a deficient number, since it is larger than the sum of its proper divisors (578886547).

740394256493 is a wasteful number, since it uses less digits than its factorization.

740394256493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578886546.

The product of its (nonzero) digits is 19595520, while the sum is 56.

The spelling of 740394256493 in words is "seven hundred forty billion, three hundred ninety-four million, two hundred fifty-six thousand, four hundred ninety-three".