90678120520036 has 81 divisors (see below), whose sum is σ = 192976079621241. Its totient is φ = 37171140261024.

The previous prime is 90678120519947. The next prime is 90678120520087. The reversal of 90678120520036 is 63002502187609.

The square root of 90678120520036 is 9522506.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11993130872100 + 78684989647936 = 3463110^2 + 8870456^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3066232146 + ... + 3066261718.

Almost surely, 2^{90678120520036} is an apocalyptic number.

90678120520036 is the 9522506-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90678120520036

90678120520036 is an abundant number, since it is smaller than the sum of its proper divisors (102297959101205).

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

90678120520036 is an frugal number, since it uses more digits than its factorization.

90678120520036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59210 (or 29605 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

90678120520036 divided by its sum of digits (49) gives a square (1850573888164 = 1360358²).

The spelling of 90678120520036 in words is "ninety trillion, six hundred seventy-eight billion, one hundred twenty million, five hundred twenty thousand, thirty-six".