7540644477 has 4 divisors (see below), whose sum is σ = 10054192640. Its totient is φ = 5027096316.

The previous prime is 7540644443. The next prime is 7540644481. The reversal of 7540644477 is 7744460457.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7540644477 - 2¹² = 7540640381 is a prime.

It is a super-2 number, since 2×7540644477² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540644577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256774077 + ... + 1256774082.

It is an arithmetic number, because the mean of its divisors is an integer number (2513548160).

Almost surely, 2^7540644477 is an apocalyptic number.

It is an amenable number.

7540644477 is a deficient number, since it is larger than the sum of its proper divisors (2513548163).

7540644477 is a wasteful number, since it uses less digits than its factorization.

7540644477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513548162.

The product of its (nonzero) digits is 2634240, while the sum is 48.

The square root of 7540644477 is about 86836.8843119098. The cubic root of 7540644477 is about 1960.9634022820.

The spelling of 7540644477 in words is "seven billion, five hundred forty million, six hundred forty-four thousand, four hundred seventy-seven".