72563558 has 4 divisors (see below), whose sum is σ = 108845340. Its totient is φ = 36281778.

The previous prime is 72563537. The next prime is 72563567. The reversal of 72563558 is 85536527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85536527 = 1373 ⋅62299.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18140888 + ... + 18140891.

It is an arithmetic number, because the mean of its divisors is an integer number (27211335).

Almost surely, 2^72563558 is an apocalyptic number.

72563558 is a deficient number, since it is larger than the sum of its proper divisors (36281782).

72563558 is a wasteful number, since it uses less digits than its factorization.

72563558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36281781.

The product of its digits is 252000, while the sum is 41.

The square root of 72563558 is about 8518.4246196113. The cubic root of 72563558 is about 417.0993596465.

The spelling of 72563558 in words is "seventy-two million, five hundred sixty-three thousand, five hundred fifty-eight".