64191436554545 has 16 divisors (see below), whose sum is σ = 77592505782528. Its totient is φ = 50977966335360.

The previous prime is 64191436554541. The next prime is 64191436554647. The reversal of 64191436554545 is 54545563419146.

It is not a de Polignac number, because 64191436554545 - 2² = 64191436554541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64191436554541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165364472 + ... + 165752198.

It is an arithmetic number, because the mean of its divisors is an integer number (4849531611408).

Almost surely, 2^{64191436554545} is an apocalyptic number.

It is an amenable number.

64191436554545 is a deficient number, since it is larger than the sum of its proper divisors (13401069227983).

64191436554545 is a wasteful number, since it uses less digits than its factorization.

64191436554545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629560.

The product of its digits is 155520000, while the sum is 62.

The spelling of 64191436554545 in words is "sixty-four trillion, one hundred ninety-one billion, four hundred thirty-six million, five hundred fifty-four thousand, five hundred forty-five".