1550521099157 has 2 divisors, whose sum is σ = 1550521099158. Its totient is φ = 1550521099156.

The previous prime is 1550521099129. The next prime is 1550521099213. The reversal of 1550521099157 is 7519901250551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1174652786596 + 375868312561 = 1083814^2 + 613081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550521099157 - 2¹⁸ = 1550520837013 is a prime.

It is a super-2 number, since 2×1550521099157² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550521099117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775260549578 + 775260549579.

It is an arithmetic number, because the mean of its divisors is an integer number (775260549579).

Almost surely, 2^{1550521099157} is an apocalyptic number.

It is an amenable number.

1550521099157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550521099157 is an equidigital number, since it uses as much as digits as its factorization.

1550521099157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 708750, while the sum is 50.

The spelling of 1550521099157 in words is "one trillion, five hundred fifty billion, five hundred twenty-one million, ninety-nine thousand, one hundred fifty-seven".