745287166993551 has 256 divisors, whose sum is σ = 1294102809280512. Its totient is φ = 371046657945600.

The previous prime is 745287166993541. The next prime is 745287166993553. The reversal of 745287166993551 is 155399661782547.

It is not a de Polignac number, because 745287166993551 - 2⁷ = 745287166993423 is a prime.

It is a super-2 number, since 2×745287166993551² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745287166993553) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 24087349741 + ... + 24087380681.

It is an arithmetic number, because the mean of its divisors is an integer number (5055089098752).

Almost surely, 2^{745287166993551} is an apocalyptic number.

745287166993551 is a deficient number, since it is larger than the sum of its proper divisors (548815642286961).

745287166993551 is a wasteful number, since it uses less digits than its factorization.

745287166993551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31502.

The product of its digits is 3429216000, while the sum is 78.

The spelling of 745287166993551 in words is "seven hundred forty-five trillion, two hundred eighty-seven billion, one hundred sixty-six million, nine hundred ninety-three thousand, five hundred fifty-one".