97944094640 has 80 divisors (see below), whose sum is σ = 260333629248. Its totient is φ = 33570229248.

The previous prime is 97944094621. The next prime is 97944094643. The reversal of 97944094640 is 4649044979.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (97944094643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1862954 + ... + 1914806.

Almost surely, 2^97944094640 is an apocalyptic number.

It is an amenable number.

97944094640 is an abundant number, since it is smaller than the sum of its proper divisors (162389534608).

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

97944094640 is a wasteful number, since it uses less digits than its factorization.

97944094640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55246 (or 55240 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 97944094640 in words is "ninety-seven billion, nine hundred forty-four million, ninety-four thousand, six hundred forty".