50781437690 has 16 divisors (see below), whose sum is σ = 91417583880. Its totient is φ = 20310131520.

The previous prime is 50781437671. The next prime is 50781437699. The reversal of 50781437690 is 9673418705.

It can be written as a sum of positive squares in 4 ways, for example, as 18192884161 + 32588553529 = 134881^2 + 180523^2 .

It is a super-2 number, since 2×50781437690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50781437699) 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, 216941 + ... + 385520.

Almost surely, 2^50781437690 is an apocalyptic number.

50781437690 is a deficient number, since it is larger than the sum of its proper divisors (40636146190).

50781437690 is a wasteful number, since it uses less digits than its factorization.

50781437690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610897.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 50781437690 in words is "fifty billion, seven hundred eighty-one million, four hundred thirty-seven thousand, six hundred ninety".