64611511403 has 4 divisors (see below), whose sum is σ = 64774261200. Its totient is φ = 64448761608.

The previous prime is 64611511369. The next prime is 64611511429. The reversal of 64611511403 is 30411511646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64611511403 - 2⁶ = 64611511339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64611511403.

It is not an unprimeable number, because it can be changed into a prime (64611511603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81374303 + ... + 81375096.

It is an arithmetic number, because the mean of its divisors is an integer number (16193565300).

Almost surely, 2^64611511403 is an apocalyptic number.

64611511403 is a deficient number, since it is larger than the sum of its proper divisors (162749797).

64611511403 is a wasteful number, since it uses less digits than its factorization.

64611511403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162749796.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 64611511403 in words is "sixty-four billion, six hundred eleven million, five hundred eleven thousand, four hundred three".