15611261340 has 24 divisors (see below), whose sum is σ = 43711531920. Its totient is φ = 4163003008.

The previous prime is 15611261333. The next prime is 15611261357. The reversal of 15611261340 is 4316211651.

It is a happy number.

It is a super-2 number, since 2×15611261340² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 15611261298 and 15611261307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130093785 + ... + 130093904.

It is an arithmetic number, because the mean of its divisors is an integer number (1821313830).

Almost surely, 2^15611261340 is an apocalyptic number.

15611261340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15611261340 is an abundant number, since it is smaller than the sum of its proper divisors (28100270580).

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

15611261340 is a wasteful number, since it uses less digits than its factorization.

15611261340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260187701 (or 260187699 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 15611261340 its reverse (4316211651), we get a palindrome (19927472991).

The spelling of 15611261340 in words is "fifteen billion, six hundred eleven million, two hundred sixty-one thousand, three hundred forty".