129449741542 has 32 divisors (see below), whose sum is σ = 216102932640. Its totient is φ = 57664696320.

The previous prime is 129449741527. The next prime is 129449741557. The reversal of 129449741542 is 245147944921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129449741527) and next prime (129449741557).

It is a self number, because there is not a number n which added to its sum of digits gives 129449741542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71283 + ... + 513790.

It is an arithmetic number, because the mean of its divisors is an integer number (6753216645).

Almost surely, 2^129449741542 is an apocalyptic number.

129449741542 is a deficient number, since it is larger than the sum of its proper divisors (86653191098).

129449741542 is a wasteful number, since it uses less digits than its factorization.

129449741542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585288.

The product of its digits is 2903040, while the sum is 52.

The spelling of 129449741542 in words is "one hundred twenty-nine billion, four hundred forty-nine million, seven hundred forty-one thousand, five hundred forty-two".