64252541506 has 16 divisors (see below), whose sum is σ = 97316446104. Its totient is φ = 31814221824.

The previous prime is 64252541489. The next prime is 64252541537. The reversal of 64252541506 is 60514525246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 54660102025 + 9592439481 = 233795^2 + 97941^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137290 + ... + 383866.

Almost surely, 2^64252541506 is an apocalyptic number.

64252541506 is a deficient number, since it is larger than the sum of its proper divisors (33063904598).

64252541506 is a wasteful number, since it uses less digits than its factorization.

64252541506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247845.

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 64252541506 in words is "sixty-four billion, two hundred fifty-two million, five hundred forty-one thousand, five hundred six".