87435949509 has 48 divisors (see below), whose sum is σ = 129909095680. Its totient is φ = 56649715200.

The previous prime is 87435949429. The next prime is 87435949583. The reversal of 87435949509 is 90594953478.

87435949509 is a `hidden beast` number, since 8 + 7 + 4 + 35 + 94 + 9 + 509 = 666.

It is not a de Polignac number, because 87435949509 - 2¹³ = 87435941317 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 (87435949589) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31192302 + ... + 31195104.

Almost surely, 2^87435949509 is an apocalyptic number.

It is an amenable number.

87435949509 is a deficient number, since it is larger than the sum of its proper divisors (42473146171).

87435949509 is a wasteful number, since it uses less digits than its factorization.

87435949509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562 (or 3559 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 87435949509 in words is "eighty-seven billion, four hundred thirty-five million, nine hundred forty-nine thousand, five hundred nine".