73652557 has 4 divisors (see below), whose sum is σ = 80348256. Its totient is φ = 66956860.

The previous prime is 73652549. The next prime is 73652561. The reversal of 73652557 is 75525637.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75525637 = 11 ⋅6865967.

It is a cyclic number.

It is not a de Polignac number, because 73652557 - 2³ = 73652549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73652567) 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, 3347833 + ... + 3347854.

It is an arithmetic number, because the mean of its divisors is an integer number (20087064).

Almost surely, 2^73652557 is an apocalyptic number.

It is an amenable number.

73652557 is a deficient number, since it is larger than the sum of its proper divisors (6695699).

73652557 is a wasteful number, since it uses less digits than its factorization.

73652557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6695698.

The product of its digits is 220500, while the sum is 40.

The square root of 73652557 is about 8582.1067926238. The cubic root of 73652557 is about 419.1755501062.

Subtracting 73652557 from its reverse (75525637), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 73652557 in words is "seventy-three million, six hundred fifty-two thousand, five hundred fifty-seven".