745747515 has 48 divisors (see below), whose sum is σ = 1353800448. Its totient is φ = 379038528.

The previous prime is 745747493. The next prime is 745747523. The reversal of 745747515 is 515747547.

745747515 is a `hidden beast` number, since 7 + 4 + 574 + 75 + 1 + 5 = 666.

It is not a de Polignac number, because 745747515 - 2¹⁴ = 745731131 is a prime.

It is a super-2 number, since 2×745747515² = 1112278712257350450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 316572 + ... + 318918.

It is an arithmetic number, because the mean of its divisors is an integer number (28204176).

Almost surely, 2^745747515 is an apocalyptic number.

745747515 is a deficient number, since it is larger than the sum of its proper divisors (608052933).

745747515 is a wasteful number, since it uses less digits than its factorization.

745747515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688 (or 2685 counting only the distinct ones).

The product of its digits is 686000, while the sum is 45.

The square root of 745747515 is about 27308.3781100233. The cubic root of 745747515 is about 906.8398678057.

The spelling of 745747515 in words is "seven hundred forty-five million, seven hundred forty-seven thousand, five hundred fifteen".