64897562511478 has 32 divisors (see below), whose sum is σ = 98891805483072. Its totient is φ = 31935256214400.

The previous prime is 64897562511473. The next prime is 64897562511491. The reversal of 64897562511478 is 87411526579846.

It is a super-3 number, since 3×64897562511478³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64897562511478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64897562511473) 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, 700935148 + ... + 701027728.

It is an arithmetic number, because the mean of its divisors is an integer number (3090368921346).

Almost surely, 2^{64897562511478} is an apocalyptic number.

64897562511478 is a deficient number, since it is larger than the sum of its proper divisors (33994242971594).

64897562511478 is a wasteful number, since it uses less digits than its factorization.

64897562511478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101320.

The product of its digits is 812851200, while the sum is 73.

The spelling of 64897562511478 in words is "sixty-four trillion, eight hundred ninety-seven billion, five hundred sixty-two million, five hundred eleven thousand, four hundred seventy-eight".