511158857947 has 2 divisors, whose sum is σ = 511158857948. Its totient is φ = 511158857946.

The previous prime is 511158857903. The next prime is 511158857983. The reversal of 511158857947 is 749758851115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511158857947 is a prime.

It is a super-2 number, since 2×511158857947² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (511158857047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255579428973 + 255579428974.

It is an arithmetic number, because the mean of its divisors is an integer number (255579428974).

Almost surely, 2^511158857947 is an apocalyptic number.

511158857947 is a deficient number, since it is larger than the sum of its proper divisors (1).

511158857947 is an equidigital number, since it uses as much as digits as its factorization.

511158857947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112000, while the sum is 61.

The spelling of 511158857947 in words is "five hundred eleven billion, one hundred fifty-eight million, eight hundred fifty-seven thousand, nine hundred forty-seven".