2156510401360 has 160 divisors (see below), whose sum is σ = 6035275503360. Its totient is φ = 700050345984.

The previous prime is 2156510401327. The next prime is 2156510401393. The reversal of 2156510401360 is 631040156512.

It is an interprime number because it is at equal distance from previous prime (2156510401327) and next prime (2156510401393).

It is a super-2 number, since 2×2156510401360² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 18380644 + ... + 18497596.

It is an arithmetic number, because the mean of its divisors is an integer number (37720471896).

Almost surely, 2^{2156510401360} is an apocalyptic number.

2156510401360 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 2156510401360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3017637751680).

2156510401360 is an abundant number, since it is smaller than the sum of its proper divisors (3878765102000).

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

2156510401360 is a wasteful number, since it uses less digits than its factorization.

2156510401360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118725 (or 118719 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 2156510401360 its reverse (631040156512), we get a palindrome (2787550557872).

The spelling of 2156510401360 in words is "two trillion, one hundred fifty-six billion, five hundred ten million, four hundred one thousand, three hundred sixty".