73426977640 has 32 divisors (see below), whose sum is σ = 168725825280. Its totient is φ = 28745879872.

The previous prime is 73426977629. The next prime is 73426977653. The reversal of 73426977640 is 4677962437.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19526572 + ... + 19530331.

It is an arithmetic number, because the mean of its divisors is an integer number (5272682040).

Almost surely, 2^73426977640 is an apocalyptic number.

It is an amenable number.

73426977640 is an abundant number, since it is smaller than the sum of its proper divisors (95298847640).

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

73426977640 is a wasteful number, since it uses less digits than its factorization.

73426977640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39056961 (or 39056957 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 55.

The spelling of 73426977640 in words is "seventy-three billion, four hundred twenty-six million, nine hundred seventy-seven thousand, six hundred forty".