145621514737181 has 16 divisors (see below), whose sum is σ = 166585831925760. Its totient is φ = 124697547366000.

The previous prime is 145621514737157. The next prime is 145621514737183. The reversal of 145621514737181 is 181737415126541.

It is not a de Polignac number, because 145621514737181 - 2¹⁸ = 145621514475037 is a prime.

It is a super-2 number, since 2×145621514737181² (a number of 29 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 (145621514737183) 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, 43386056 + ... + 46621806.

It is an arithmetic number, because the mean of its divisors is an integer number (10411614495360).

Almost surely, 2^{145621514737181} is an apocalyptic number.

It is an amenable number.

145621514737181 is a deficient number, since it is larger than the sum of its proper divisors (20964317188579).

145621514737181 is a wasteful number, since it uses less digits than its factorization.

145621514737181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241984.

The product of its digits is 5644800, while the sum is 56.

The spelling of 145621514737181 in words is "one hundred forty-five trillion, six hundred twenty-one billion, five hundred fourteen million, seven hundred thirty-seven thousand, one hundred eighty-one".