64854220031 has 4 divisors (see below), whose sum is σ = 67673968752. Its totient is φ = 62034471312.

The previous prime is 64854220027. The next prime is 64854220033. The reversal of 64854220031 is 13002245846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64854220031 - 2² = 64854220027 is a prime.

It is a super-2 number, since 2×64854220031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64854219973 and 64854220000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64854220033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409874326 + ... + 1409874371.

It is an arithmetic number, because the mean of its divisors is an integer number (16918492188).

Almost surely, 2^64854220031 is an apocalyptic number.

64854220031 is a deficient number, since it is larger than the sum of its proper divisors (2819748721).

64854220031 is a wasteful number, since it uses less digits than its factorization.

64854220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819748720.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 64854220031 its reverse (13002245846), we get a palindrome (77856465877).

The spelling of 64854220031 in words is "sixty-four billion, eight hundred fifty-four million, two hundred twenty thousand, thirty-one".