69440294621 has 4 divisors (see below), whose sum is σ = 73525017852. Its totient is φ = 65355571392.

The previous prime is 69440294611. The next prime is 69440294641. The reversal of 69440294621 is 12649204496.

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 57221424100 + 12218870521 = 239210^2 + 110539^2 .

It is not a de Polignac number, because 69440294621 - 2⁶ = 69440294557 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 (69440294611) 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, 2042361590 + ... + 2042361623.

It is an arithmetic number, because the mean of its divisors is an integer number (18381254463).

Almost surely, 2^69440294621 is an apocalyptic number.

It is an amenable number.

69440294621 is a deficient number, since it is larger than the sum of its proper divisors (4084723231).

69440294621 is a wasteful number, since it uses less digits than its factorization.

69440294621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4084723230.

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 69440294621 in words is "sixty-nine billion, four hundred forty million, two hundred ninety-four thousand, six hundred twenty-one".