64737490 has 8 divisors (see below), whose sum is σ = 116527500. Its totient is φ = 25894992.

The previous prime is 64737487. The next prime is 64737499. The reversal of 64737490 is 9473746.

It can be written as a sum of positive squares in 2 ways, for example, as 61199329 + 3538161 = 7823^2 + 1881^2 .

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

It is a super-3 number, since 3×64737490³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (64737499) 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, 3236865 + ... + 3236884.

Almost surely, 2^64737490 is an apocalyptic number.

64737490 is a deficient number, since it is larger than the sum of its proper divisors (51790010).

64737490 is a wasteful number, since it uses less digits than its factorization.

64737490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473756.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 64737490 is about 8045.9610985885. The cubic root of 64737490 is about 401.5305733927.

The spelling of 64737490 in words is "sixty-four million, seven hundred thirty-seven thousand, four hundred ninety".