15955664742 has 32 divisors (see below), whose sum is σ = 36998645760. Its totient is φ = 5087313000.

The previous prime is 15955664741. The next prime is 15955664761. The reversal of 15955664742 is 24746655951.

15955664742 is a `hidden beast` number, since 1 + 5 + 9 + 5 + 566 + 4 + 74 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15955664741) 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, 6422134 + ... + 6424617.

It is an arithmetic number, because the mean of its divisors is an integer number (1156207680).

Almost surely, 2^15955664742 is an apocalyptic number.

15955664742 is an abundant number, since it is smaller than the sum of its proper divisors (21042981018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15955664742 is a wasteful number, since it uses less digits than its factorization.

15955664742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12846785 (or 12846779 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 54.

The spelling of 15955664742 in words is "fifteen billion, nine hundred fifty-five million, six hundred sixty-four thousand, seven hundred forty-two".