49001863681 has 4 divisors (see below), whose sum is σ = 49023634864. Its totient is φ = 48980092500.

The previous prime is 49001863663. The next prime is 49001863693. The reversal of 49001863681 is 18636810094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49001863681 - 2¹⁷ = 49001732609 is a prime.

It is a super-2 number, since 2×49001863681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49001863181) 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, 10882215 + ... + 10886716.

It is an arithmetic number, because the mean of its divisors is an integer number (12255908716).

Almost surely, 2^49001863681 is an apocalyptic number.

It is an amenable number.

49001863681 is a deficient number, since it is larger than the sum of its proper divisors (21771183).

49001863681 is a wasteful number, since it uses less digits than its factorization.

49001863681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21771182.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 49001863681 in words is "forty-nine billion, one million, eight hundred sixty-three thousand, six hundred eighty-one".