49386578021 has 8 divisors (see below), whose sum is σ = 55734069600. Its totient is φ = 43348720240.

The previous prime is 49386578009. The next prime is 49386578071. The reversal of 49386578021 is 12087568394.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49386578021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49386578071) 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, 77408111 + ... + 77408748.

It is an arithmetic number, because the mean of its divisors is an integer number (6966758700).

It is a 2-persistent number, because it is pandigital, and so is 2⋅49386578021 = 98773156042, but 3⋅49386578021 = 148159734063 is not.

Almost surely, 2^49386578021 is an apocalyptic number.

It is an amenable number.

49386578021 is a deficient number, since it is larger than the sum of its proper divisors (6347491579).

49386578021 is a wasteful number, since it uses less digits than its factorization.

49386578021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154816899.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 49386578021 in words is "forty-nine billion, three hundred eighty-six million, five hundred seventy-eight thousand, twenty-one".