7155820634487 has 16 divisors (see below), whose sum is σ = 10953004984320. Its totient is φ = 4070703856032.

The previous prime is 7155820634411. The next prime is 7155820634491. The reversal of 7155820634487 is 7844360285517.

It is not a de Polignac number, because 7155820634487 - 2¹⁸ = 7155820372343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7155820634487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7155820634387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764016312 + ... + 764025677.

It is an arithmetic number, because the mean of its divisors is an integer number (684562811520).

Almost surely, 2^{7155820634487} is an apocalyptic number.

7155820634487 is a deficient number, since it is larger than the sum of its proper divisors (3797184349833).

7155820634487 is a wasteful number, since it uses less digits than its factorization.

7155820634487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528042222.

The product of its (nonzero) digits is 45158400, while the sum is 60.

The spelling of 7155820634487 in words is "seven trillion, one hundred fifty-five billion, eight hundred twenty million, six hundred thirty-four thousand, four hundred eighty-seven".