55772273765 has 8 divisors (see below), whose sum is σ = 72074938488. Its totient is φ = 41185679040.

The previous prime is 55772273761. The next prime is 55772273773. The reversal of 55772273765 is 56737227755.

It can be written as a sum of positive squares in 4 ways, for example, as 6146246404 + 49626027361 = 78398^2 + 222769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55772273765 - 2² = 55772273761 is a prime.

It is a super-2 number, since 2×55772273765² (a number of 22 digits) contains 22 as substring.

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 55772273765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55772273761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429017426 + ... + 429017555.

It is an arithmetic number, because the mean of its divisors is an integer number (9009367311).

Almost surely, 2^55772273765 is an apocalyptic number.

It is an amenable number.

55772273765 is a deficient number, since it is larger than the sum of its proper divisors (16302664723).

55772273765 is a wasteful number, since it uses less digits than its factorization.

55772273765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858034999.

The product of its digits is 21609000, while the sum is 56.

The spelling of 55772273765 in words is "fifty-five billion, seven hundred seventy-two million, two hundred seventy-three thousand, seven hundred sixty-five".