139785890051 has 2 divisors, whose sum is σ = 139785890052. Its totient is φ = 139785890050.

The previous prime is 139785890047. The next prime is 139785890059. The reversal of 139785890051 is 150098587931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139785890051 - 2² = 139785890047 is a prime.

It is not a weakly prime, because it can be changed into another prime (139785890059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69892945025 + 69892945026.

It is an arithmetic number, because the mean of its divisors is an integer number (69892945026).

Almost surely, 2^139785890051 is an apocalyptic number.

139785890051 is a deficient number, since it is larger than the sum of its proper divisors (1).

139785890051 is an equidigital number, since it uses as much as digits as its factorization.

139785890051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 56.

The spelling of 139785890051 in words is "one hundred thirty-nine billion, seven hundred eighty-five million, eight hundred ninety thousand, fifty-one".