20150616634678 has 16 divisors (see below), whose sum is σ = 30657962156544. Its totient is φ = 9932306529600.

The previous prime is 20150616634669. The next prime is 20150616634711. The reversal of 20150616634678 is 87643661605102.

It is a happy number.

It is a super-2 number, since 2×20150616634678² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252613423 + ... + 252693178.

It is an arithmetic number, because the mean of its divisors is an integer number (1916122634784).

Almost surely, 2^{20150616634678} is an apocalyptic number.

20150616634678 is a deficient number, since it is larger than the sum of its proper divisors (10507345521866).

20150616634678 is a wasteful number, since it uses less digits than its factorization.

20150616634678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505306887.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 20150616634678 in words is "twenty trillion, one hundred fifty billion, six hundred sixteen million, six hundred thirty-four thousand, six hundred seventy-eight".