15435140068 has 6 divisors (see below), whose sum is σ = 27011495126. Its totient is φ = 7717570032.

The previous prime is 15435140057. The next prime is 15435140101. The reversal of 15435140068 is 86004153451.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14010983424 + 1424156644 = 118368^2 + 37738^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1929392505 + ... + 1929392512.

Almost surely, 2^15435140068 is an apocalyptic number.

It is an amenable number.

15435140068 is a deficient number, since it is larger than the sum of its proper divisors (11576355058).

15435140068 is a wasteful number, since it uses less digits than its factorization.

15435140068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858785021 (or 3858785019 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 15435140068 in words is "fifteen billion, four hundred thirty-five million, one hundred forty thousand, sixty-eight".