149728400477 has 2 divisors, whose sum is σ = 149728400478. Its totient is φ = 149728400476.

The previous prime is 149728400449. The next prime is 149728400491. The reversal of 149728400477 is 774004827941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98187595801 + 51540804676 = 313349^2 + 227026^2 .

It is a cyclic number.

It is not a de Polignac number, because 149728400477 - 2³⁰ = 148654658653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149728400377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74864200238 + 74864200239.

It is an arithmetic number, because the mean of its divisors is an integer number (74864200239).

Almost surely, 2^149728400477 is an apocalyptic number.

It is an amenable number.

149728400477 is a deficient number, since it is larger than the sum of its proper divisors (1).

149728400477 is an equidigital number, since it uses as much as digits as its factorization.

149728400477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 149728400477 in words is "one hundred forty-nine billion, seven hundred twenty-eight million, four hundred thousand, four hundred seventy-seven".