39649089452178 has 16 divisors (see below), whose sum is σ = 79298977617216. Its totient is φ = 13216230031920.

The previous prime is 39649089452173. The next prime is 39649089452233. The reversal of 39649089452178 is 87125498094693.

It is a super-2 number, since 2×39649089452178² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39649089452173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32633401 + ... + 33826572.

It is an arithmetic number, because the mean of its divisors is an integer number (4956186101076).

It is a 2-persistent number, because it is pandigital, and so is 2⋅39649089452178 = 79298178904356, but 3⋅39649089452178 = 118947268356534 is not.

Almost surely, 2^{39649089452178} is an apocalyptic number.

39649089452178 is an abundant number, since it is smaller than the sum of its proper divisors (39649888165038).

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

39649089452178 is a wasteful number, since it uses less digits than its factorization.

39649089452178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66559409.

The product of its (nonzero) digits is 940584960, while the sum is 75.

The spelling of 39649089452178 in words is "thirty-nine trillion, six hundred forty-nine billion, eighty-nine million, four hundred fifty-two thousand, one hundred seventy-eight".