64603515641 has 8 divisors (see below), whose sum is σ = 74872485504. Its totient is φ = 54594519840.

The previous prime is 64603515637. The next prime is 64603515653. The reversal of 64603515641 is 14651530646.

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

It is not a de Polignac number, because 64603515641 - 2² = 64603515637 is a prime.

It is a super-2 number, since 2×64603515641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64603515241) 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, 64992980 + ... + 64993973.

It is an arithmetic number, because the mean of its divisors is an integer number (9359060688).

Almost surely, 2^64603515641 is an apocalyptic number.

It is an amenable number.

64603515641 is a deficient number, since it is larger than the sum of its proper divisors (10268969863).

64603515641 is a wasteful number, since it uses less digits than its factorization.

64603515641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129987031.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 64603515641 in words is "sixty-four billion, six hundred three million, five hundred fifteen thousand, six hundred forty-one".