49626617857 has 4 divisors (see below), whose sum is σ = 49628911876. Its totient is φ = 49624323840.

The previous prime is 49626617839. The next prime is 49626617867. The reversal of 49626617857 is 75871662694.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13545235456 + 36081382401 = 116384^2 + 189951^2 .

It is a cyclic number.

It is not a de Polignac number, because 49626617857 - 2²⁷ = 49492400129 is a prime.

It is a super-2 number, since 2×49626617857² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49626617795 and 49626617804.

It is not an unprimeable number, because it can be changed into a prime (49626617837) 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, 1114248 + ... + 1157929.

It is an arithmetic number, because the mean of its divisors is an integer number (12407227969).

Almost surely, 2^49626617857 is an apocalyptic number.

It is an amenable number.

49626617857 is a deficient number, since it is larger than the sum of its proper divisors (2294019).

49626617857 is a wasteful number, since it uses less digits than its factorization.

49626617857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294018.

The product of its digits is 30481920, while the sum is 61.

The spelling of 49626617857 in words is "forty-nine billion, six hundred twenty-six million, six hundred seventeen thousand, eight hundred fifty-seven".