91554479280 has 320 divisors, whose sum is σ = 352417443840. Its totient is φ = 21653452800.

The previous prime is 91554479227. The next prime is 91554479299. The reversal of 91554479280 is 8297445519.

It is a happy number.

91554479280 is a `hidden beast` number, since 9 + 1 + 5 + 544 + 7 + 92 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 927169 + ... + 1021151.

It is an arithmetic number, because the mean of its divisors is an integer number (1101304512).

Almost surely, 2^91554479280 is an apocalyptic number.

91554479280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91554479280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176208721920).

91554479280 is an abundant number, since it is smaller than the sum of its proper divisors (260862964560).

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

91554479280 is a wasteful number, since it uses less digits than its factorization.

91554479280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94057 (or 94045 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 91554479280 in words is "ninety-one billion, five hundred fifty-four million, four hundred seventy-nine thousand, two hundred eighty".