145642172651 has 2 divisors, whose sum is σ = 145642172652. Its totient is φ = 145642172650.

The previous prime is 145642172639. The next prime is 145642172699. The reversal of 145642172651 is 156271246541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145642172651 - 2¹⁴ = 145642156267 is a prime.

It is not a weakly prime, because it can be changed into another prime (145642102651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72821086325 + 72821086326.

It is an arithmetic number, because the mean of its divisors is an integer number (72821086326).

Almost surely, 2^145642172651 is an apocalyptic number.

145642172651 is a deficient number, since it is larger than the sum of its proper divisors (1).

145642172651 is an equidigital number, since it uses as much as digits as its factorization.

145642172651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 44.

The spelling of 145642172651 in words is "one hundred forty-five billion, six hundred forty-two million, one hundred seventy-two thousand, six hundred fifty-one".