148446507681961 has 2 divisors, whose sum is σ = 148446507681962. Its totient is φ = 148446507681960.

The previous prime is 148446507681943. The next prime is 148446507682049. The reversal of 148446507681961 is 169186705644841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126056756250000 + 22389751431961 = 11227500^2 + 4731781^2 .

It is a cyclic number.

It is not a de Polignac number, because 148446507681961 - 2¹¹ = 148446507679913 is a prime.

It is not a weakly prime, because it can be changed into another prime (148446507681061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74223253840980 + 74223253840981.

It is an arithmetic number, because the mean of its divisors is an integer number (74223253840981).

Almost surely, 2^{148446507681961} is an apocalyptic number.

It is an amenable number.

148446507681961 is a deficient number, since it is larger than the sum of its proper divisors (1).

148446507681961 is an equidigital number, since it uses as much as digits as its factorization.

148446507681961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 278691840, while the sum is 70.

The spelling of 148446507681961 in words is "one hundred forty-eight trillion, four hundred forty-six billion, five hundred seven million, six hundred eighty-one thousand, nine hundred sixty-one".