64196770402 has 8 divisors (see below), whose sum is σ = 99615678300. Its totient is φ = 30991544304.

The previous prime is 64196770399. The next prime is 64196770409. The reversal of 64196770402 is 20407769146.

It can be written as a sum of positive squares in 2 ways, for example, as 63342319041 + 854451361 = 251679^2 + 29231^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64196770409) 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, 553420377 + ... + 553420492.

Almost surely, 2^64196770402 is an apocalyptic number.

64196770402 is a deficient number, since it is larger than the sum of its proper divisors (35418907898).

64196770402 is a wasteful number, since it uses less digits than its factorization.

64196770402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106840900.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 64196770402 in words is "sixty-four billion, one hundred ninety-six million, seven hundred seventy thousand, four hundred two".