672215553 has 6 divisors (see below), whose sum is σ = 970978034. Its totient is φ = 448143696.

The previous prime is 672215521. The next prime is 672215597. The reversal of 672215553 is 355512276.

It can be written as a sum of positive squares in only one way, i.e., 506115009 + 166100544 = 22497^2 + 12888^2 .

It is not a de Polignac number, because 672215553 - 2⁵ = 672215521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672215053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37345300 + ... + 37345317.

Almost surely, 2^672215553 is an apocalyptic number.

It is an amenable number.

672215553 is a deficient number, since it is larger than the sum of its proper divisors (298762481).

672215553 is a wasteful number, since it uses less digits than its factorization.

672215553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74690623 (or 74690620 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 672215553 is about 25927.1200290352. The cubic root of 672215553 is about 875.9974705938.

It can be divided in two parts, 672 and 215553, that added together give a square (216225 = 465²).

The spelling of 672215553 in words is "six hundred seventy-two million, two hundred fifteen thousand, five hundred fifty-three".