68507553 has 4 divisors (see below), whose sum is σ = 91343408. Its totient is φ = 45671700.

The previous prime is 68507539. The next prime is 68507561. The reversal of 68507553 is 35570586.

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.

It is not a de Polignac number, because 68507553 - 2¹⁴ = 68491169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68507513) 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, 11417923 + ... + 11417928.

It is an arithmetic number, because the mean of its divisors is an integer number (22835852).

Almost surely, 2^68507553 is an apocalyptic number.

It is an amenable number.

68507553 is a deficient number, since it is larger than the sum of its proper divisors (22835855).

68507553 is a wasteful number, since it uses less digits than its factorization.

68507553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22835854.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 68507553 is about 8276.9289594632. The cubic root of 68507553 is about 409.1785117939.

The spelling of 68507553 in words is "sixty-eight million, five hundred seven thousand, five hundred fifty-three".