64811157562851 has 16 divisors (see below), whose sum is σ = 98760097371648. Its totient is φ = 37034857843200.

The previous prime is 64811157562847. The next prime is 64811157562891. The reversal of 64811157562851 is 15826575111846.

It is not a de Polignac number, because 64811157562851 - 2² = 64811157562847 is a prime.

It is a super-2 number, since 2×64811157562851² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64811157562891) 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, 5751466 + ... + 12755456.

It is an arithmetic number, because the mean of its divisors is an integer number (6172506085728).

Almost surely, 2^{64811157562851} is an apocalyptic number.

64811157562851 is a deficient number, since it is larger than the sum of its proper divisors (33948939808797).

64811157562851 is a wasteful number, since it uses less digits than its factorization.

64811157562851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7444642.

The product of its digits is 16128000, while the sum is 60.

The spelling of 64811157562851 in words is "sixty-four trillion, eight hundred eleven billion, one hundred fifty-seven million, five hundred sixty-two thousand, eight hundred fifty-one".