49179621787 has 2 divisors, whose sum is σ = 49179621788. Its totient is φ = 49179621786.

The previous prime is 49179621769. The next prime is 49179621857. The reversal of 49179621787 is 78712697194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49179621787 - 2¹¹ = 49179619739 is a prime.

It is a super-2 number, since 2×49179621787² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49179621767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24589810893 + 24589810894.

It is an arithmetic number, because the mean of its divisors is an integer number (24589810894).

Almost surely, 2^49179621787 is an apocalyptic number.

49179621787 is a deficient number, since it is larger than the sum of its proper divisors (1).

49179621787 is an equidigital number, since it uses as much as digits as its factorization.

49179621787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 61.

The spelling of 49179621787 in words is "forty-nine billion, one hundred seventy-nine million, six hundred twenty-one thousand, seven hundred eighty-seven".