64475706154 has 4 divisors (see below), whose sum is σ = 96713559234. Its totient is φ = 32237853076.

The previous prime is 64475706107. The next prime is 64475706157. The reversal of 64475706154 is 45160757446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 39614931225 + 24860774929 = 199035^2 + 157673^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 64475706098 and 64475706107.

It is not an unprimeable number, because it can be changed into a prime (64475706157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16118926537 + ... + 16118926540.

Almost surely, 2^64475706154 is an apocalyptic number.

64475706154 is a deficient number, since it is larger than the sum of its proper divisors (32237853080).

64475706154 is a wasteful number, since it uses less digits than its factorization.

64475706154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32237853079.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 64475706154 in words is "sixty-four billion, four hundred seventy-five million, seven hundred six thousand, one hundred fifty-four".