7542738491 has 2 divisors, whose sum is σ = 7542738492. Its totient is φ = 7542738490.

The previous prime is 7542738457. The next prime is 7542738523. The reversal of 7542738491 is 1948372457.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7542738491 - 2¹⁰ = 7542737467 is a prime.

It is a super-2 number, since 2×7542738491² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7542738451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3771369245 + 3771369246.

It is an arithmetic number, because the mean of its divisors is an integer number (3771369246).

Almost surely, 2^7542738491 is an apocalyptic number.

7542738491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7542738491 is an equidigital number, since it uses as much as digits as its factorization.

7542738491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 7542738491 is about 86848.9406440862. The cubic root of 7542738491 is about 1961.1449033366.

The spelling of 7542738491 in words is "seven billion, five hundred forty-two million, seven hundred thirty-eight thousand, four hundred ninety-one".