7628138137535 has 4 divisors (see below), whose sum is σ = 9153765765048. Its totient is φ = 6102510510024.

The previous prime is 7628138137531. The next prime is 7628138137553. The reversal of 7628138137535 is 5357318318267.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7628138137535 - 2² = 7628138137531 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 (7628138137531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762813813749 + ... + 762813813758.

It is an arithmetic number, because the mean of its divisors is an integer number (2288441441262).

Almost surely, 2^{7628138137535} is an apocalyptic number.

7628138137535 is a deficient number, since it is larger than the sum of its proper divisors (1525627627513).

7628138137535 is a wasteful number, since it uses less digits than its factorization.

7628138137535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525627627512.

The product of its digits is 25401600, while the sum is 59.

The spelling of 7628138137535 in words is "seven trillion, six hundred twenty-eight billion, one hundred thirty-eight million, one hundred thirty-seven thousand, five hundred thirty-five".