145421561958 has 16 divisors (see below), whose sum is σ = 295184066880. Its totient is φ = 47750363496.

The previous prime is 145421561953. The next prime is 145421561969. The reversal of 145421561958 is 859165124541.

It is a super-2 number, since 2×145421561958² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145421561958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145421561953) 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, 180872188 + ... + 180872991.

It is an arithmetic number, because the mean of its divisors is an integer number (18449004180).

Almost surely, 2^145421561958 is an apocalyptic number.

145421561958 is an abundant number, since it is smaller than the sum of its proper divisors (149762504922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145421561958 is a wasteful number, since it uses less digits than its factorization.

145421561958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361745251.

The product of its digits is 1728000, while the sum is 51.

The spelling of 145421561958 in words is "one hundred forty-five billion, four hundred twenty-one million, five hundred sixty-one thousand, nine hundred fifty-eight".