149437121557 has 2 divisors, whose sum is σ = 149437121558. Its totient is φ = 149437121556.

The previous prime is 149437121513. The next prime is 149437121567. The reversal of 149437121557 is 755121734941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96571156081 + 52865965476 = 310759^2 + 229926^2 .

It is a cyclic number.

It is not a de Polignac number, because 149437121557 - 2⁷ = 149437121429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149437121557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149437121567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74718560778 + 74718560779.

It is an arithmetic number, because the mean of its divisors is an integer number (74718560779).

Almost surely, 2^149437121557 is an apocalyptic number.

It is an amenable number.

149437121557 is a deficient number, since it is larger than the sum of its proper divisors (1).

149437121557 is an equidigital number, since it uses as much as digits as its factorization.

149437121557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 49.

The spelling of 149437121557 in words is "one hundred forty-nine billion, four hundred thirty-seven million, one hundred twenty-one thousand, five hundred fifty-seven".