2151605755356 has 24 divisors (see below), whose sum is σ = 5020457280384. Its totient is φ = 717195654000.

The previous prime is 2151605755331. The next prime is 2151605755391. The reversal of 2151605755356 is 6535575061512.

It is a junction number, because it is equal to n+sod(n) for n = 2151605755299 and 2151605755308.

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, 771481 + ... + 2213231.

It is an arithmetic number, because the mean of its divisors is an integer number (209185720016).

Almost surely, 2^{2151605755356} is an apocalyptic number.

It is an amenable number.

2151605755356 is an abundant number, since it is smaller than the sum of its proper divisors (2868851525028).

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

2151605755356 is a wasteful number, since it uses less digits than its factorization.

2151605755356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566121 (or 1566119 counting only the distinct ones).

The product of its (nonzero) digits is 4725000, while the sum is 51.

The spelling of 2151605755356 in words is "two trillion, one hundred fifty-one billion, six hundred five million, seven hundred fifty-five thousand, three hundred fifty-six".