764540052553 has 4 divisors (see below), whose sum is σ = 765294782148. Its totient is φ = 763785322960.

The previous prime is 764540052547. The next prime is 764540052559. The reversal of 764540052553 is 355250045467.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (764540052547) and next prime (764540052559).

It can be written as a sum of positive squares in 2 ways, for example, as 146196875449 + 618343177104 = 382357^2 + 786348^2 .

It is a cyclic number.

It is not a de Polignac number, because 764540052553 - 2²⁵ = 764506498121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764540052559) 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, 377363278 + ... + 377365303.

It is an arithmetic number, because the mean of its divisors is an integer number (191323695537).

Almost surely, 2^764540052553 is an apocalyptic number.

It is an amenable number.

764540052553 is a deficient number, since it is larger than the sum of its proper divisors (754729595).

764540052553 is a wasteful number, since it uses less digits than its factorization.

764540052553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754729594.

The product of its (nonzero) digits is 2520000, while the sum is 46.

The spelling of 764540052553 in words is "seven hundred sixty-four billion, five hundred forty million, fifty-two thousand, five hundred fifty-three".