5435685904921 has 4 divisors (see below), whose sum is σ = 5435708350644. Its totient is φ = 5435663459200.

The previous prime is 5435685904919. The next prime is 5435685904973. The reversal of 5435685904921 is 1294095865345.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2746348298521 + 2689337606400 = 1657211^2 + 1639920^2 .

It is a cyclic number.

It is not a de Polignac number, because 5435685904921 - 2¹ = 5435685904919 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 5435685904921.

It is not an unprimeable number, because it can be changed into a prime (5435685904021) 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, 10855600 + ... + 11345281.

It is an arithmetic number, because the mean of its divisors is an integer number (1358927087661).

Almost surely, 2^{5435685904921} is an apocalyptic number.

It is an amenable number.

5435685904921 is a deficient number, since it is larger than the sum of its proper divisors (22445723).

5435685904921 is a wasteful number, since it uses less digits than its factorization.

5435685904921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22445722.

The product of its (nonzero) digits is 46656000, while the sum is 61.

The spelling of 5435685904921 in words is "five trillion, four hundred thirty-five billion, six hundred eighty-five million, nine hundred four thousand, nine hundred twenty-one".