155511206516 has 24 divisors (see below), whose sum is σ = 275149598976. Its totient is φ = 76898775200.

The previous prime is 155511206509. The next prime is 155511206519. The reversal of 155511206516 is 615602115551.

It is a self number, because there is not a number n which added to its sum of digits gives 155511206516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155511206519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141365 + ... + 575331.

It is an arithmetic number, because the mean of its divisors is an integer number (11464566624).

Almost surely, 2^155511206516 is an apocalyptic number.

It is an amenable number.

155511206516 is a deficient number, since it is larger than the sum of its proper divisors (119638392460).

155511206516 is a wasteful number, since it uses less digits than its factorization.

155511206516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434959 (or 434957 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 38.

The spelling of 155511206516 in words is "one hundred fifty-five billion, five hundred eleven million, two hundred six thousand, five hundred sixteen".