15550623607 has 4 divisors (see below), whose sum is σ = 15551094240. Its totient is φ = 15550152976.

The previous prime is 15550623581. The next prime is 15550623619. The reversal of 15550623607 is 70632605551.

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 15550623607 - 2²³ = 15542234999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15550623607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550633607) 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, 181678 + ... + 253195.

It is an arithmetic number, because the mean of its divisors is an integer number (3887773560).

Almost surely, 2^15550623607 is an apocalyptic number.

15550623607 is a deficient number, since it is larger than the sum of its proper divisors (470633).

15550623607 is an equidigital number, since it uses as much as digits as its factorization.

15550623607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470632.

The product of its (nonzero) digits is 189000, while the sum is 40.

The spelling of 15550623607 in words is "fifteen billion, five hundred fifty million, six hundred twenty-three thousand, six hundred seven".