261214503620 has 96 divisors (see below), whose sum is σ = 640392480000. Its totient is φ = 87642607104.

The previous prime is 261214503581. The next prime is 261214503631. The reversal of 261214503620 is 26305412162.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2841131 + ... + 2931629.

It is an arithmetic number, because the mean of its divisors is an integer number (6670755000).

Almost surely, 2^261214503620 is an apocalyptic number.

261214503620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261214503620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320196240000).

261214503620 is an abundant number, since it is smaller than the sum of its proper divisors (379177976380).

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

261214503620 is a wasteful number, since it uses less digits than its factorization.

261214503620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90957 (or 90955 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 261214503620 its reverse (26305412162), we get a palindrome (287519915782).

The spelling of 261214503620 in words is "two hundred sixty-one billion, two hundred fourteen million, five hundred three thousand, six hundred twenty".