745121949615 has 40 divisors (see below), whose sum is σ = 1393774021728. Its totient is φ = 380120178240.

The previous prime is 745121949563. The next prime is 745121949631. The reversal of 745121949615 is 516949121547.

745121949615 is a `hidden beast` number, since 7 + 4 + 5 + 1 + 2 + 19 + 4 + 9 + 615 = 666.

It is not a de Polignac number, because 745121949615 - 2¹⁷ = 745121818543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39986496 + ... + 40005125.

Almost surely, 2^745121949615 is an apocalyptic number.

745121949615 is a deficient number, since it is larger than the sum of its proper divisors (648652072113).

745121949615 is a wasteful number, since it uses less digits than its factorization.

745121949615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79991661 (or 79991652 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 745121949615 in words is "seven hundred forty-five billion, one hundred twenty-one million, nine hundred forty-nine thousand, six hundred fifteen".