64473157 has 8 divisors (see below), whose sum is σ = 74892032. Its totient is φ = 54356400.

The previous prime is 64473139. The next prime is 64473161. The reversal of 64473157 is 75137446.

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

It is a de Polignac number, because none of the positive numbers 2^k-64473157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64473107) 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, 75069 + ... + 75922.

It is an arithmetic number, because the mean of its divisors is an integer number (9361504).

Almost surely, 2^64473157 is an apocalyptic number.

It is an amenable number.

64473157 is a deficient number, since it is larger than the sum of its proper divisors (10418875).

64473157 is a wasteful number, since it uses less digits than its factorization.

64473157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151059.

The product of its digits is 70560, while the sum is 37.

The square root of 64473157 is about 8029.5178560110. The cubic root of 64473157 is about 400.9833244517.

It can be divided in two parts, 6447 and 3157, that added together give a square (9604 = 98²).

The spelling of 64473157 in words is "sixty-four million, four hundred seventy-three thousand, one hundred fifty-seven".