64520768362413 has 16 divisors (see below), whose sum is σ = 94012748324352. Its totient is φ = 39035013486000.

The previous prime is 64520768362411. The next prime is 64520768362433. The reversal of 64520768362413 is 31426386702546.

It is not a de Polignac number, because 64520768362413 - 2¹ = 64520768362411 is a prime.

It is a super-2 number, since 2×64520768362413² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520768362411) 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, 1712043153 + ... + 1712080838.

It is an arithmetic number, because the mean of its divisors is an integer number (5875796770272).

Almost surely, 2^{64520768362413} is an apocalyptic number.

It is an amenable number.

64520768362413 is a deficient number, since it is larger than the sum of its proper divisors (29491979961939).

64520768362413 is a wasteful number, since it uses less digits than its factorization.

64520768362413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424124576.

The product of its (nonzero) digits is 34836480, while the sum is 57.

The spelling of 64520768362413 in words is "sixty-four trillion, five hundred twenty billion, seven hundred sixty-eight million, three hundred sixty-two thousand, four hundred thirteen".