149949395777 has 2 divisors, whose sum is σ = 149949395778. Its totient is φ = 149949395776.

The previous prime is 149949395753. The next prime is 149949395821. The reversal of 149949395777 is 777593949941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131287376896 + 18662018881 = 362336^2 + 136609^2 .

It is a cyclic number.

It is not a de Polignac number, because 149949395777 - 2⁸ = 149949395521 is a prime.

It is not a weakly prime, because it can be changed into another prime (149949395377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74974697888 + 74974697889.

It is an arithmetic number, because the mean of its divisors is an integer number (74974697889).

Almost surely, 2^149949395777 is an apocalyptic number.

It is an amenable number.

149949395777 is a deficient number, since it is larger than the sum of its proper divisors (1).

149949395777 is an equidigital number, since it uses as much as digits as its factorization.

149949395777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540101520, while the sum is 74.

The spelling of 149949395777 in words is "one hundred forty-nine billion, nine hundred forty-nine million, three hundred ninety-five thousand, seven hundred seventy-seven".