145621438946957 has 2 divisors, whose sum is σ = 145621438946958. Its totient is φ = 145621438946956.

The previous prime is 145621438946933. The next prime is 145621438946959. The reversal of 145621438946957 is 759649834126541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81940496305801 + 63680942641156 = 9052099^2 + 7980034^2 .

It is a cyclic number.

It is not a de Polignac number, because 145621438946957 - 2³² = 145617143979661 is a prime.

Together with 145621438946959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145621438946959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72810719473478 + 72810719473479.

It is an arithmetic number, because the mean of its divisors is an integer number (72810719473479).

Almost surely, 2^{145621438946957} is an apocalyptic number.

It is an amenable number.

145621438946957 is a deficient number, since it is larger than the sum of its proper divisors (1).

145621438946957 is an equidigital number, since it uses as much as digits as its factorization.

145621438946957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1567641600, while the sum is 74.

The spelling of 145621438946957 in words is "one hundred forty-five trillion, six hundred twenty-one billion, four hundred thirty-eight million, nine hundred forty-six thousand, nine hundred fifty-seven".