157425774476561 has 2 divisors, whose sum is σ = 157425774476562. Its totient is φ = 157425774476560.

The previous prime is 157425774476507. The next prime is 157425774476609. The reversal of 157425774476561 is 165674477524751.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156628604068225 + 797170408336 = 12515135^2 + 892844^2 .

It is a cyclic number.

It is not a de Polignac number, because 157425774476561 - 2²² = 157425770282257 is a prime.

It is not a weakly prime, because it can be changed into another prime (157425774476161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78712887238280 + 78712887238281.

It is an arithmetic number, because the mean of its divisors is an integer number (78712887238281).

Almost surely, 2^{157425774476561} is an apocalyptic number.

It is an amenable number.

157425774476561 is a deficient number, since it is larger than the sum of its proper divisors (1).

157425774476561 is an equidigital number, since it uses as much as digits as its factorization.

157425774476561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976000, while the sum is 71.

The spelling of 157425774476561 in words is "one hundred fifty-seven trillion, four hundred twenty-five billion, seven hundred seventy-four million, four hundred seventy-six thousand, five hundred sixty-one".