145121655615 has 16 divisors (see below), whose sum is σ = 232203170016. Its totient is φ = 77395376000.

The previous prime is 145121655571. The next prime is 145121655683. The reversal of 145121655615 is 516556121541.

It is not a de Polignac number, because 145121655615 - 2¹⁶ = 145121590079 is a prime.

It is a super-2 number, since 2×145121655615² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283465 + ... + 608765.

It is an arithmetic number, because the mean of its divisors is an integer number (14512698126).

Almost surely, 2^145121655615 is an apocalyptic number.

145121655615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145121655615 is a deficient number, since it is larger than the sum of its proper divisors (87081514401).

145121655615 is a wasteful number, since it uses less digits than its factorization.

145121655615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355050.

The product of its digits is 180000, while the sum is 42.

The spelling of 145121655615 in words is "one hundred forty-five billion, one hundred twenty-one million, six hundred fifty-five thousand, six hundred fifteen".