145093906981 has 8 divisors (see below), whose sum is σ = 146269247040. Its totient is φ = 143920252128.

The previous prime is 145093906973. The next prime is 145093906987. The reversal of 145093906981 is 189609390541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145093906981 - 2³ = 145093906973 is a prime.

It is a super-2 number, since 2×145093906981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145093906987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248121 + ... + 593086.

It is an arithmetic number, because the mean of its divisors is an integer number (18283655880).

Almost surely, 2^145093906981 is an apocalyptic number.

It is an amenable number.

145093906981 is a deficient number, since it is larger than the sum of its proper divisors (1175340059).

145093906981 is a wasteful number, since it uses less digits than its factorization.

145093906981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842603.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The spelling of 145093906981 in words is "one hundred forty-five billion, ninety-three million, nine hundred six thousand, nine hundred eighty-one".