145643379399 has 128 divisors (see below), whose sum is σ = 271351808000. Its totient is φ = 75330777600.

The previous prime is 145643379383. The next prime is 145643379433. The reversal of 145643379399 is 993973346541.

145643379399 is a `hidden beast` number, since 1 + 4 + 564 + 3 + 37 + 9 + 39 + 9 = 666.

It is not a de Polignac number, because 145643379399 - 2⁴ = 145643379383 is a prime.

It is a super-2 number, since 2×145643379399² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145643379379) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8786079 + ... + 8802639.

It is an arithmetic number, because the mean of its divisors is an integer number (2119936000).

Almost surely, 2^145643379399 is an apocalyptic number.

145643379399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

145643379399 is a deficient number, since it is larger than the sum of its proper divisors (125708428601).

145643379399 is a wasteful number, since it uses less digits than its factorization.

145643379399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16706 (or 16700 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 63.

The spelling of 145643379399 in words is "one hundred forty-five billion, six hundred forty-three million, three hundred seventy-nine thousand, three hundred ninety-nine".