72506619 has 6 divisors (see below), whose sum is σ = 104731796. Its totient is φ = 48337740.

The previous prime is 72506617. The next prime is 72506653. The reversal of 72506619 is 91660527.

It is not a de Polignac number, because 72506619 - 2¹ = 72506617 is a prime.

It is a super-2 number, since 2×72506619² = 10514419597622322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72506611) 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, 4028137 + ... + 4028154.

Almost surely, 2^72506619 is an apocalyptic number.

72506619 is a deficient number, since it is larger than the sum of its proper divisors (32225177).

72506619 is a wasteful number, since it uses less digits than its factorization.

72506619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8056297 (or 8056294 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 72506619 is about 8515.0818551556. The cubic root of 72506619 is about 416.9902349213.

The spelling of 72506619 in words is "seventy-two million, five hundred six thousand, six hundred nineteen".