73740576981 has 16 divisors (see below), whose sum is σ = 103928601600. Its totient is φ = 46378121328.

The previous prime is 73740576971. The next prime is 73740577003. The reversal of 73740576981 is 18967504737.

It is a happy number.

It is not a de Polignac number, because 73740576981 - 2¹⁹ = 73740052693 is a prime.

It is a super-2 number, since 2×73740576981² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73740576971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2692851 + ... + 2720096.

It is an arithmetic number, because the mean of its divisors is an integer number (6495537600).

Almost surely, 2^73740576981 is an apocalyptic number.

It is an amenable number.

73740576981 is a deficient number, since it is larger than the sum of its proper divisors (30188024619).

73740576981 is a wasteful number, since it uses less digits than its factorization.

73740576981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413208.

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 73740576981 in words is "seventy-three billion, seven hundred forty million, five hundred seventy-six thousand, nine hundred eighty-one".