157620843621799 has 2 divisors, whose sum is σ = 157620843621800. Its totient is φ = 157620843621798.

The previous prime is 157620843621757. The next prime is 157620843621853. The reversal of 157620843621799 is 997126348026751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157620843621799 - 2³¹ = 157618696138151 is a prime.

It is a super-2 number, since 2×157620843621799² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157620543621799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78810421810899 + 78810421810900.

It is an arithmetic number, because the mean of its divisors is an integer number (78810421810900).

It is a 1-persistent number, because it is pandigital, but 2⋅157620843621799 = 315241687243598 is not.

Almost surely, 2^{157620843621799} is an apocalyptic number.

157620843621799 is a deficient number, since it is larger than the sum of its proper divisors (1).

157620843621799 is an equidigital number, since it uses as much as digits as its factorization.

157620843621799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 274337280, while the sum is 70.

The spelling of 157620843621799 in words is "one hundred fifty-seven trillion, six hundred twenty billion, eight hundred forty-three million, six hundred twenty-one thousand, seven hundred ninety-nine".