320400149501 has 2 divisors, whose sum is σ = 320400149502. Its totient is φ = 320400149500.

The previous prime is 320400149429. The next prime is 320400149519. The reversal of 320400149501 is 105941004023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253965602500 + 66434547001 = 503950^2 + 257749^2 .

It is a cyclic number.

It is not a de Polignac number, because 320400149501 - 2²⁶ = 320333040637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320400149581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160200074750 + 160200074751.

It is an arithmetic number, because the mean of its divisors is an integer number (160200074751).

Almost surely, 2^320400149501 is an apocalyptic number.

It is an amenable number.

320400149501 is a deficient number, since it is larger than the sum of its proper divisors (1).

320400149501 is an equidigital number, since it uses as much as digits as its factorization.

320400149501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 320400149501 in words is "three hundred twenty billion, four hundred million, one hundred forty-nine thousand, five hundred one".