145657951769 has 4 divisors (see below), whose sum is σ = 158899583760. Its totient is φ = 132416319780.

The previous prime is 145657951727. The next prime is 145657951771. The reversal of 145657951769 is 967159756541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145657951769 - 2¹⁶ = 145657886233 is a prime.

It is a super-2 number, since 2×145657951769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145657951469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6620815979 + ... + 6620816000.

It is an arithmetic number, because the mean of its divisors is an integer number (39724895940).

Almost surely, 2^145657951769 is an apocalyptic number.

It is an amenable number.

145657951769 is a deficient number, since it is larger than the sum of its proper divisors (13241631991).

145657951769 is a wasteful number, since it uses less digits than its factorization.

145657951769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13241631990.

The product of its digits is 71442000, while the sum is 65.

The spelling of 145657951769 in words is "one hundred forty-five billion, six hundred fifty-seven million, nine hundred fifty-one thousand, seven hundred sixty-nine".