49380657981 has 32 divisors (see below), whose sum is σ = 71713689600. Its totient is φ = 30109242240.

The previous prime is 49380657971. The next prime is 49380658003. The reversal of 49380657981 is 18975608394.

It is not a de Polignac number, because 49380657981 - 2¹⁸ = 49380395837 is a prime.

It is a super-2 number, since 2×49380657981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49380657971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 707025 + ... + 773721.

It is an arithmetic number, because the mean of its divisors is an integer number (2241052800).

Almost surely, 2^49380657981 is an apocalyptic number.

It is an amenable number.

49380657981 is a deficient number, since it is larger than the sum of its proper divisors (22333031619).

49380657981 is a wasteful number, since it uses less digits than its factorization.

49380657981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67169.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 49380657981 in words is "forty-nine billion, three hundred eighty million, six hundred fifty-seven thousand, nine hundred eighty-one".