91825957540 has 24 divisors (see below), whose sum is σ = 192840250680. Its totient is φ = 36729289728.

The previous prime is 91825957513. The next prime is 91825957543. The reversal of 91825957540 is 4575952819.

It can be written as a sum of positive squares in 4 ways, for example, as 2426153536 + 89399804004 = 49256^2 + 298998^2 .

It is not an unprimeable number, because it can be changed into a prime (91825957543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151604 + ... + 1228756.

It is an arithmetic number, because the mean of its divisors is an integer number (8035010445).

Almost surely, 2^91825957540 is an apocalyptic number.

It is an amenable number.

91825957540 is an abundant number, since it is smaller than the sum of its proper divisors (101014293140).

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

91825957540 is a wasteful number, since it uses less digits than its factorization.

91825957540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136671 (or 136669 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 55.

The spelling of 91825957540 in words is "ninety-one billion, eight hundred twenty-five million, nine hundred fifty-seven thousand, five hundred forty".