49986356978 has 8 divisors (see below), whose sum is σ = 77565036780. Its totient is φ = 24131344720.

The previous prime is 49986356971. The next prime is 49986357023. The reversal of 49986356978 is 87965368994.

It can be written as a sum of positive squares in 2 ways, for example, as 49438188409 + 548168569 = 222347^2 + 23413^2 .

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

It is not an unprimeable number, because it can be changed into a prime (49986356971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430916813 + ... + 430916928.

Almost surely, 2^49986356978 is an apocalyptic number.

49986356978 is a deficient number, since it is larger than the sum of its proper divisors (27578679802).

49986356978 is a wasteful number, since it uses less digits than its factorization.

49986356978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861833772.

The product of its digits is 705438720, while the sum is 74.

The spelling of 49986356978 in words is "forty-nine billion, nine hundred eighty-six million, three hundred fifty-six thousand, nine hundred seventy-eight".