64260632197 has 4 divisors (see below), whose sum is σ = 64467258336. Its totient is φ = 64054006060.

The previous prime is 64260632173. The next prime is 64260632243. The reversal of 64260632197 is 79123606246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64260632197 - 2⁷ = 64260632069 is a prime.

It is a super-2 number, since 2×64260632197² (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 (64260632797) 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, 103312603 + ... + 103313224.

It is an arithmetic number, because the mean of its divisors is an integer number (16116814584).

Almost surely, 2^64260632197 is an apocalyptic number.

It is an amenable number.

64260632197 is a deficient number, since it is larger than the sum of its proper divisors (206626139).

64260632197 is a wasteful number, since it uses less digits than its factorization.

64260632197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206626138.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 64260632197 in words is "sixty-four billion, two hundred sixty million, six hundred thirty-two thousand, one hundred ninety-seven".