87047439455428 has 6 divisors (see below), whose sum is σ = 152333019047006. Its totient is φ = 43523719727712.

The previous prime is 87047439455411. The next prime is 87047439455447. The reversal of 87047439455428 is 82455493474078.

It can be written as a sum of positive squares in only one way, i.e., 44044167550084 + 43003271905344 = 6636578^2 + 6557688^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10880929931925 + ... + 10880929931932.

Almost surely, 2^{87047439455428} is an apocalyptic number.

It is an amenable number.

87047439455428 is a deficient number, since it is larger than the sum of its proper divisors (65285579591578).

87047439455428 is a wasteful number, since it uses less digits than its factorization.

87047439455428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21761859863861 (or 21761859863859 counting only the distinct ones).

The product of its (nonzero) digits is 1083801600, while the sum is 70.

The spelling of 87047439455428 in words is "eighty-seven trillion, forty-seven billion, four hundred thirty-nine million, four hundred fifty-five thousand, four hundred twenty-eight".