72546377 has 4 divisors (see below), whose sum is σ = 72574596. Its totient is φ = 72518160.

The previous prime is 72546283. The next prime is 72546391. The reversal of 72546377 is 77364527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77364527 = 163 ⋅474629.

It can be written as a sum of positive squares in 2 ways, for example, as 31854736 + 40691641 = 5644^2 + 6379^2 .

It is a cyclic number.

It is not a de Polignac number, because 72546377 - 2¹⁰ = 72545353 is a prime.

It is a super-2 number, since 2×72546377² = 10525953631652258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72545377) 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, 9818 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (18143649).

Almost surely, 2^72546377 is an apocalyptic number.

It is an amenable number.

72546377 is a deficient number, since it is larger than the sum of its proper divisors (28219).

72546377 is a wasteful number, since it uses less digits than its factorization.

72546377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28218.

The product of its digits is 246960, while the sum is 41.

The square root of 72546377 is about 8517.4160987943. The cubic root of 72546377 is about 417.0664379341.

It can be divided in two parts, 7254 and 6377, that added together give a palindrome (13631).

The spelling of 72546377 in words is "seventy-two million, five hundred forty-six thousand, three hundred seventy-seven".