64428740425 has 12 divisors (see below), whose sum is σ = 91304729536. Its totient is φ = 44179707600.

The previous prime is 64428740407. The next prime is 64428740471. The reversal of 64428740425 is 52404782446.

It is a de Polignac number, because none of the positive numbers 2^k-64428740425 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184081941 + ... + 184082290.

Almost surely, 2^64428740425 is an apocalyptic number.

It is an amenable number.

64428740425 is a deficient number, since it is larger than the sum of its proper divisors (26875989111).

64428740425 is a wasteful number, since it uses less digits than its factorization.

64428740425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368164248 (or 368164243 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 46.

The spelling of 64428740425 in words is "sixty-four billion, four hundred twenty-eight million, seven hundred forty thousand, four hundred twenty-five".