149764442657 has 2 divisors, whose sum is σ = 149764442658. Its totient is φ = 149764442656.

The previous prime is 149764442647. The next prime is 149764442677. The reversal of 149764442657 is 756244467941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135064335121 + 14700107536 = 367511^2 + 121244^2 .

It is a cyclic number.

It is not a de Polignac number, because 149764442657 - 2¹² = 149764438561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 149764442596 and 149764442605.

It is not a weakly prime, because it can be changed into another prime (149764442627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74882221328 + 74882221329.

It is an arithmetic number, because the mean of its divisors is an integer number (74882221329).

Almost surely, 2^149764442657 is an apocalyptic number.

It is an amenable number.

149764442657 is a deficient number, since it is larger than the sum of its proper divisors (1).

149764442657 is an equidigital number, since it uses as much as digits as its factorization.

149764442657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 59.

The spelling of 149764442657 in words is "one hundred forty-nine billion, seven hundred sixty-four million, four hundred forty-two thousand, six hundred fifty-seven".