64910431749 has 8 divisors (see below), whose sum is σ = 87207908832. Its totient is φ = 42943287920.

The previous prime is 64910431739. The next prime is 64910431763. The reversal of 64910431749 is 94713401946.

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 64910431749 - 2¹⁵ = 64910398981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64910431698 and 64910431707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64910431739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82582854 + ... + 82583639.

It is an arithmetic number, because the mean of its divisors is an integer number (10900988604).

Almost surely, 2^64910431749 is an apocalyptic number.

It is an amenable number.

64910431749 is a deficient number, since it is larger than the sum of its proper divisors (22297477083).

64910431749 is a wasteful number, since it uses less digits than its factorization.

64910431749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165166627.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 64910431749 in words is "sixty-four billion, nine hundred ten million, four hundred thirty-one thousand, seven hundred forty-nine".