87511800148931 has 2 divisors, whose sum is σ = 87511800148932. Its totient is φ = 87511800148930.

The previous prime is 87511800148847. The next prime is 87511800149047. The reversal of 87511800148931 is 13984100811578.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87511800148931 is a prime.

It is a super-2 number, since 2×87511800148931² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87511800168931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43755900074465 + 43755900074466.

It is an arithmetic number, because the mean of its divisors is an integer number (43755900074466).

Almost surely, 2^{87511800148931} is an apocalyptic number.

87511800148931 is a deficient number, since it is larger than the sum of its proper divisors (1).

87511800148931 is an equidigital number, since it uses as much as digits as its factorization.

87511800148931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 56.

The spelling of 87511800148931 in words is "eighty-seven trillion, five hundred eleven billion, eight hundred million, one hundred forty-eight thousand, nine hundred thirty-one".