745225971156 has 18 divisors (see below), whose sum is σ = 1883765649402. Its totient is φ = 248408657040.

The previous prime is 745225971143. The next prime is 745225971157. The reversal of 745225971156 is 651179522547.

745225971156 is a `hidden beast` number, since 7 + 4 + 522 + 59 + 7 + 11 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 442868954256 + 302357016900 = 665484^2 + 549870^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745225971157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10350360675 + ... + 10350360746.

It is an arithmetic number, because the mean of its divisors is an integer number (104653647189).

Almost surely, 2^745225971156 is an apocalyptic number.

It is an amenable number.

745225971156 is an abundant number, since it is smaller than the sum of its proper divisors (1138539678246).

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

745225971156 is a wasteful number, since it uses less digits than its factorization.

745225971156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20700721431 (or 20700721426 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 54.

The spelling of 745225971156 in words is "seven hundred forty-five billion, two hundred twenty-five million, nine hundred seventy-one thousand, one hundred fifty-six".