64540858074901 has 16 divisors (see below), whose sum is σ = 72360258591600. Its totient is φ = 57155444656128.

The previous prime is 64540858074887. The next prime is 64540858074911. The reversal of 64540858074901 is 10947085804546.

It can be written as a sum of positive squares in 8 ways, for example, as 17601162999876 + 46939695075025 = 4195374^2 + 6851255^2 .

It is not a de Polignac number, because 64540858074901 - 2⁹ = 64540858074389 is a prime.

It is a super-2 number, since 2×64540858074901² (a number of 28 digits) contains 22 as substring.

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 64540858074901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64540858074911) 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, 545150716 + ... + 545269093.

It is an arithmetic number, because the mean of its divisors is an integer number (4522516161975).

Almost surely, 2^{64540858074901} is an apocalyptic number.

It is an amenable number.

64540858074901 is a deficient number, since it is larger than the sum of its proper divisors (7819400516699).

64540858074901 is a wasteful number, since it uses less digits than its factorization.

64540858074901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090420008.

The product of its (nonzero) digits is 38707200, while the sum is 61.

The spelling of 64540858074901 in words is "sixty-four trillion, five hundred forty billion, eight hundred fifty-eight million, seventy-four thousand, nine hundred one".