1642740526 has 16 divisors (see below), whose sum is σ = 2841965280. Its totient is φ = 697572000.

The previous prime is 1642740521. The next prime is 1642740527. The reversal of 1642740526 is 6250472461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642740521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536725 + ... + 539776.

It is an arithmetic number, because the mean of its divisors is an integer number (177622830).

Almost surely, 2^1642740526 is an apocalyptic number.

1642740526 is a deficient number, since it is larger than the sum of its proper divisors (1199224754).

1642740526 is a wasteful number, since it uses less digits than its factorization.

1642740526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076619.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 1642740526 is about 40530.7355719089. The cubic root of 1642740526 is about 1179.9302185106.

It can be divided in two parts, 16427 and 40526, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 1642740526 in words is "one billion, six hundred forty-two million, seven hundred forty thousand, five hundred twenty-six".