64150251841 has 9 divisors (see below), whose sum is σ = 69468039459. Its totient is φ = 59212577736.

The previous prime is 64150251839. The next prime is 64150251857. The reversal of 64150251841 is 14815205146.

The square root of 64150251841 is 253279.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9489682225 + 54660569616 = 97415^2 + 233796^2 .

It is not a de Polignac number, because 64150251841 - 2¹ = 64150251839 is a prime.

It is a super-2 number, since 2×64150251841² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64150251841.

It is not an unprimeable number, because it can be changed into a prime (64150251041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3282886 + ... + 3302368.

It is an arithmetic number, because the mean of its divisors is an integer number (7718671051).

Almost surely, 2^64150251841 is an apocalyptic number.

64150251841 is the 253279-th square number.

64150251841 is the 126640-th centered octagonal number.

It is an amenable number.

64150251841 is a deficient number, since it is larger than the sum of its proper divisors (5317787618).

64150251841 is an frugal number, since it uses more digits than its factorization.

64150251841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38992 (or 19496 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

Adding to 64150251841 its reverse (14815205146), we get a palindrome (78965456987).

The spelling of 64150251841 in words is "sixty-four billion, one hundred fifty million, two hundred fifty-one thousand, eight hundred forty-one".