42521525554 has 4 divisors (see below), whose sum is σ = 63782288334. Its totient is φ = 21260762776.

The previous prime is 42521525549. The next prime is 42521525567. The reversal of 42521525554 is 45552512524.

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., 21994373025 + 20527152529 = 148305^2 + 143273^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630381387 + ... + 10630381390.

Almost surely, 2^42521525554 is an apocalyptic number.

42521525554 is a deficient number, since it is larger than the sum of its proper divisors (21260762780).

42521525554 is a wasteful number, since it uses less digits than its factorization.

42521525554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21260762779.

The product of its digits is 400000, while the sum is 40.

The spelling of 42521525554 in words is "forty-two billion, five hundred twenty-one million, five hundred twenty-five thousand, five hundred fifty-four".