64306161949 has 8 divisors (see below), whose sum is σ = 66073006008. Its totient is φ = 62540835840.

The previous prime is 64306161943. The next prime is 64306161971. The reversal of 64306161949 is 94916160346.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22995599449 + 41310562500 = 151643^2 + 203250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64306161949 - 2¹⁹ = 64305637661 is a prime.

It is a super-2 number, since 2×64306161949² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64306161943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293332 + ... + 463309.

It is an arithmetic number, because the mean of its divisors is an integer number (8259125751).

Almost surely, 2^64306161949 is an apocalyptic number.

It is an amenable number.

64306161949 is a deficient number, since it is larger than the sum of its proper divisors (1766844059).

64306161949 is a wasteful number, since it uses less digits than its factorization.

64306161949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758975.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 64306161949 in words is "sixty-four billion, three hundred six million, one hundred sixty-one thousand, nine hundred forty-nine".