15945949655 has 4 divisors (see below), whose sum is σ = 19135139592. Its totient is φ = 12756759720.

The previous prime is 15945949651. The next prime is 15945949661. The reversal of 15945949655 is 55694954951.

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

It is not a de Polignac number, because 15945949655 - 2² = 15945949651 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 (15945949651) 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, 1594594961 + ... + 1594594970.

It is an arithmetic number, because the mean of its divisors is an integer number (4783784898).

Almost surely, 2^15945949655 is an apocalyptic number.

15945949655 is a deficient number, since it is larger than the sum of its proper divisors (3189189937).

15945949655 is an equidigital number, since it uses as much as digits as its factorization.

15945949655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189189936.

The product of its digits is 43740000, while the sum is 62.

The spelling of 15945949655 in words is "fifteen billion, nine hundred forty-five million, nine hundred forty-nine thousand, six hundred fifty-five".