64775327547 has 32 divisors (see below), whose sum is σ = 104447508480. Its totient is φ = 34906465440.

The previous prime is 64775327521. The next prime is 64775327563. The reversal of 64775327547 is 74572357746.

It is not a de Polignac number, because 64775327547 - 2¹⁰ = 64775326523 is a prime.

It is a super-2 number, since 2×64775327547² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64775327567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 910147 + ... + 978732.

It is an arithmetic number, because the mean of its divisors is an integer number (3263984640).

Almost surely, 2^64775327547 is an apocalyptic number.

64775327547 is a deficient number, since it is larger than the sum of its proper divisors (39672180933).

64775327547 is a wasteful number, since it uses less digits than its factorization.

64775327547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888983.

The product of its digits is 34574400, while the sum is 57.

The spelling of 64775327547 in words is "sixty-four billion, seven hundred seventy-five million, three hundred twenty-seven thousand, five hundred forty-seven".