73906906356 has 24 divisors (see below), whose sum is σ = 191610498240. Its totient is φ = 24635635416.

The previous prime is 73906906351. The next prime is 73906906453. The reversal of 73906906356 is 65360960937.

It is a happy number.

It is a super-2 number, since 2×73906906356² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73906906351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342161496 + ... + 342161711.

It is an arithmetic number, because the mean of its divisors is an integer number (7983770760).

Almost surely, 2^73906906356 is an apocalyptic number.

It is an amenable number.

73906906356 is an abundant number, since it is smaller than the sum of its proper divisors (117703591884).

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

73906906356 is a wasteful number, since it uses less digits than its factorization.

73906906356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684323220 (or 684323212 counting only the distinct ones).

The product of its (nonzero) digits is 5511240, while the sum is 54.

The spelling of 73906906356 in words is "seventy-three billion, nine hundred six million, nine hundred six thousand, three hundred fifty-six".