15240890377581 has 16 divisors (see below), whose sum is σ = 22170012859200. Its totient is φ = 9236301160320.

The previous prime is 15240890377571. The next prime is 15240890377607. The reversal of 15240890377581 is 18577309804251.

It is not a de Polignac number, because 15240890377581 - 2⁵ = 15240890377549 is a prime.

It is a super-2 number, since 2×15240890377581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15240890377561) 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, 14538280 + ... + 15551313.

It is an arithmetic number, because the mean of its divisors is an integer number (1385625803700).

Almost surely, 2^{15240890377581} is an apocalyptic number.

15240890377581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15240890377581 is a deficient number, since it is larger than the sum of its proper divisors (6929122481619).

15240890377581 is a wasteful number, since it uses less digits than its factorization.

15240890377581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30104956.

The product of its (nonzero) digits is 16934400, while the sum is 60.

The spelling of 15240890377581 in words is "fifteen trillion, two hundred forty billion, eight hundred ninety million, three hundred seventy-seven thousand, five hundred eighty-one".