91954992039 has 32 divisors (see below), whose sum is σ = 125849518080. Its totient is φ = 59707615968.

The previous prime is 91954991957. The next prime is 91954992091. The reversal of 91954992039 is 93029945919.

It is not a de Polignac number, because 91954992039 - 2¹¹ = 91954989991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91954996039) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6412932 + ... + 6427254.

It is an arithmetic number, because the mean of its divisors is an integer number (3932797440).

Almost surely, 2^91954992039 is an apocalyptic number.

91954992039 is a deficient number, since it is larger than the sum of its proper divisors (33894526041).

91954992039 is a wasteful number, since it uses less digits than its factorization.

91954992039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14771.

The product of its (nonzero) digits is 7085880, while the sum is 60.

The spelling of 91954992039 in words is "ninety-one billion, nine hundred fifty-four million, nine hundred ninety-two thousand, thirty-nine".