15555505050497 has 8 divisors (see below), whose sum is σ = 15613087875840. Its totient is φ = 15497970720160.

The previous prime is 15555505050479. The next prime is 15555505050517. The reversal of 15555505050497 is 79405050555551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15555505050497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15555505050427) 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, 11480972 + ... + 12764157.

It is an arithmetic number, because the mean of its divisors is an integer number (1951635984480).

Almost surely, 2^{15555505050497} is an apocalyptic number.

It is an amenable number.

15555505050497 is a deficient number, since it is larger than the sum of its proper divisors (57582825343).

15555505050497 is a wasteful number, since it uses less digits than its factorization.

15555505050497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24247503.

The product of its (nonzero) digits is 19687500, while the sum is 56.

The spelling of 15555505050497 in words is "fifteen trillion, five hundred fifty-five billion, five hundred five million, fifty thousand, four hundred ninety-seven".