79815542 has 8 divisors (see below), whose sum is σ = 126024600. Its totient is φ = 37807344.

The previous prime is 79815469. The next prime is 79815551. The reversal of 79815542 is 24551897.

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

It is a self number, because there is not a number n which added to its sum of digits gives 79815542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050167 + ... + 1050242.

It is an arithmetic number, because the mean of its divisors is an integer number (15753075).

Almost surely, 2^79815542 is an apocalyptic number.

79815542 is a deficient number, since it is larger than the sum of its proper divisors (46209058).

79815542 is a wasteful number, since it uses less digits than its factorization.

79815542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100430.

The product of its digits is 100800, while the sum is 41.

The square root of 79815542 is about 8933.9544435821. The cubic root of 79815542 is about 430.5555142233. Note that the first 4 decimals are identical.

The spelling of 79815542 in words is "seventy-nine million, eight hundred fifteen thousand, five hundred forty-two".