145800815831 has 32 divisors (see below), whose sum is σ = 173296800000. Its totient is φ = 121172405760.

The previous prime is 145800815827. The next prime is 145800815833. The reversal of 145800815831 is 138518008541.

It is not a de Polignac number, because 145800815831 - 2² = 145800815827 is a prime.

It is a super-2 number, since 2×145800815831² (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 (145800815833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12898220 + ... + 12909518.

It is an arithmetic number, because the mean of its divisors is an integer number (5415525000).

Almost surely, 2^145800815831 is an apocalyptic number.

145800815831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145800815831 is a deficient number, since it is larger than the sum of its proper divisors (27495984169).

145800815831 is a wasteful number, since it uses less digits than its factorization.

145800815831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13487.

The product of its (nonzero) digits is 153600, while the sum is 44.

The spelling of 145800815831 in words is "one hundred forty-five billion, eight hundred million, eight hundred fifteen thousand, eight hundred thirty-one".