73951907481 has 9 divisors (see below), whose sum is σ = 106820600341. Its totient is φ = 49300727772.

The previous prime is 73951907479. The next prime is 73951907489. The reversal of 73951907481 is 18470915937.

It is a happy number.

The square root of 73951907481 is 271941.

It is a perfect power (a square), and thus also a powerful number.

73951907481 is a `hidden beast` number, since 73 + 9 + 5 + 1 + 90 + 7 + 481 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 73951907481 - 2¹ = 73951907479 is a prime.

It is a super-2 number, since 2×73951907481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73951907489) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 770500 + ... + 861146.

Almost surely, 2^73951907481 is an apocalyptic number.

73951907481 is the 271941-st square number.

73951907481 is the 135971-st centered octagonal number.

It is an amenable number.

73951907481 is a deficient number, since it is larger than the sum of its proper divisors (32868692860).

73951907481 is an frugal number, since it uses more digits than its factorization.

73951907481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181300 (or 90650 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 73951907481 in words is "seventy-three billion, nine hundred fifty-one million, nine hundred seven thousand, four hundred eighty-one".