1972564535 has 16 divisors (see below), whose sum is σ = 2434180896. Its totient is φ = 1533426048.

The previous prime is 1972564507. The next prime is 1972564537. The reversal of 1972564535 is 5354652791.

It is a cyclic number.

It is not a de Polignac number, because 1972564535 - 2¹⁶ = 1972498999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1972564535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972564537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146549 + ... + 159441.

It is an arithmetic number, because the mean of its divisors is an integer number (152136306).

Almost surely, 2^1972564535 is an apocalyptic number.

1972564535 is a deficient number, since it is larger than the sum of its proper divisors (461616361).

1972564535 is a wasteful number, since it uses less digits than its factorization.

1972564535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13762.

The product of its digits is 1134000, while the sum is 47.

The square root of 1972564535 is about 44413.5625119175. The cubic root of 1972564535 is about 1254.1334176214.

The spelling of 1972564535 in words is "one billion, nine hundred seventy-two million, five hundred sixty-four thousand, five hundred thirty-five".