87402699620478 has 96 divisors (see below), whose sum is σ = 209629417102560. Its totient is φ = 26098151546880.

The previous prime is 87402699620429. The next prime is 87402699620527.

87402699620478 is a `hidden beast` number, since 8 + 7 + 4 + 0 + 2 + 6 + 99 + 62 + 0 + 478 = 666.

87402699620478 is nontrivially palindromic in base 10.

87402699620478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (87402699620429) and next prime (87402699620527).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5538075 + ... + 14334422.

It is an arithmetic number, because the mean of its divisors is an integer number (2183639761485).

Almost surely, 2^{87402699620478} is an apocalyptic number.

87402699620478 is an abundant number, since it is smaller than the sum of its proper divisors (122226717482082).

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

87402699620478 is a wasteful number, since it uses less digits than its factorization.

87402699620478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19872842 (or 19872839 counting only the distinct ones).

The product of its (nonzero) digits is 585252864, while the sum is 72.

The spelling of 87402699620478 in words is "eighty-seven trillion, four hundred two billion, six hundred ninety-nine million, six hundred twenty thousand, four hundred seventy-eight".