2158451128 has 8 divisors (see below), whose sum is σ = 4047095880. Its totient is φ = 1079225560.

The previous prime is 2158451111. The next prime is 2158451131. The reversal of 2158451128 is 8211548512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2158451128² = 9317822543928944768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134903188 + ... + 134903203.

It is an arithmetic number, because the mean of its divisors is an integer number (505886985).

Almost surely, 2^2158451128 is an apocalyptic number.

It is an amenable number.

2158451128 is a deficient number, since it is larger than the sum of its proper divisors (1888644752).

2158451128 is a wasteful number, since it uses less digits than its factorization.

2158451128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269806397 (or 269806393 counting only the distinct ones).

The product of its digits is 25600, while the sum is 37.

The square root of 2158451128 is about 46459.1339566290. The cubic root of 2158451128 is about 1292.3517638809.

The spelling of 2158451128 in words is "two billion, one hundred fifty-eight million, four hundred fifty-one thousand, one hundred twenty-eight".