145401326421 has 16 divisors (see below), whose sum is σ = 213223551744. Its totient is φ = 87573956544.

The previous prime is 145401326387. The next prime is 145401326449. The reversal of 145401326421 is 124623104541.

It is a happy number.

It is not a de Polignac number, because 145401326421 - 2⁷ = 145401326293 is a prime.

It is a super-2 number, since 2×145401326421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145401326221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39660286 + ... + 39663951.

It is an arithmetic number, because the mean of its divisors is an integer number (13326471984).

Almost surely, 2^145401326421 is an apocalyptic number.

It is an amenable number.

145401326421 is a deficient number, since it is larger than the sum of its proper divisors (67822225323).

145401326421 is a wasteful number, since it uses less digits than its factorization.

145401326421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79324300.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 145401326421 in words is "one hundred forty-five billion, four hundred one million, three hundred twenty-six thousand, four hundred twenty-one".