742678920756 has 18 divisors (see below), whose sum is σ = 1877327272002. Its totient is φ = 247559640240.

The previous prime is 742678920749. The next prime is 742678920773. The reversal of 742678920756 is 657029876247.

742678920756 is a `hidden beast` number, since 7 + 426 + 78 + 92 + 0 + 7 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 703686099600 + 38992821156 = 838860^2 + 197466^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×742678920756² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 742678920693 and 742678920702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10314984975 + ... + 10314985046.

Almost surely, 2^742678920756 is an apocalyptic number.

It is an amenable number.

742678920756 is an abundant number, since it is smaller than the sum of its proper divisors (1134648351246).

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

742678920756 is a wasteful number, since it uses less digits than its factorization.

742678920756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20629970031 (or 20629970026 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 63.

The spelling of 742678920756 in words is "seven hundred forty-two billion, six hundred seventy-eight million, nine hundred twenty thousand, seven hundred fifty-six".