7620745431 has 32 divisors (see below), whose sum is σ = 11613127680. Its totient is φ = 4403602944.

The previous prime is 7620745427. The next prime is 7620745459. The reversal of 7620745431 is 1345470267.

It is not a de Polignac number, because 7620745431 - 2² = 7620745427 is a prime.

It is a super-2 number, since 2×7620745431² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 7620745431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7620749431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277966 + ... + 304148.

It is an arithmetic number, because the mean of its divisors is an integer number (362910240).

Almost surely, 2^7620745431 is an apocalyptic number.

7620745431 is a deficient number, since it is larger than the sum of its proper divisors (3992382249).

7620745431 is a wasteful number, since it uses less digits than its factorization.

7620745431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26655.

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 7620745431 is about 87296.8809923928. The cubic root of 7620745431 is about 1967.8824447781.

The spelling of 7620745431 in words is "seven billion, six hundred twenty million, seven hundred forty-five thousand, four hundred thirty-one".