851970411491 has 2 divisors, whose sum is σ = 851970411492. Its totient is φ = 851970411490.

The previous prime is 851970411433. The next prime is 851970411541. The reversal of 851970411491 is 194114079158.

It is an a-pointer prime, because the next prime (851970411541) can be obtained adding 851970411491 to its sum of digits (50).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 851970411491 - 2⁶ = 851970411427 is a prime.

It is a super-2 number, since 2×851970411491² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (851970411191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425985205745 + 425985205746.

It is an arithmetic number, because the mean of its divisors is an integer number (425985205746).

Almost surely, 2^851970411491 is an apocalyptic number.

851970411491 is a deficient number, since it is larger than the sum of its proper divisors (1).

851970411491 is an equidigital number, since it uses as much as digits as its factorization.

851970411491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 50.

The spelling of 851970411491 in words is "eight hundred fifty-one billion, nine hundred seventy million, four hundred eleven thousand, four hundred ninety-one".