15155771240 has 32 divisors (see below), whose sum is σ = 34120732680. Its totient is φ = 6058708992.

The previous prime is 15155771159. The next prime is 15155771251. The reversal of 15155771240 is 4217755151.

It can be written as a sum of positive squares in 4 ways, for example, as 15078366436 + 77404804 = 122794^2 + 8798^2 .

It is a super-2 number, since 2×15155771240² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15155771194 and 15155771203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43757 + ... + 179516.

Almost surely, 2^15155771240 is an apocalyptic number.

15155771240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15155771240 is an abundant number, since it is smaller than the sum of its proper divisors (18964961440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15155771240 is a wasteful number, since it uses less digits than its factorization.

15155771240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224981 (or 224977 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 38.

The spelling of 15155771240 in words is "fifteen billion, one hundred fifty-five million, seven hundred seventy-one thousand, two hundred forty".