7504549961 has 2 divisors, whose sum is σ = 7504549962. Its totient is φ = 7504549960.

The previous prime is 7504549957. The next prime is 7504549973. The reversal of 7504549961 is 1699454057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7111717561 + 392832400 = 84331^2 + 19820^2 .

It is a cyclic number.

It is not a de Polignac number, because 7504549961 - 2² = 7504549957 is a prime.

It is not a weakly prime, because it can be changed into another prime (7504549951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3752274980 + 3752274981.

It is an arithmetic number, because the mean of its divisors is an integer number (3752274981).

Almost surely, 2^7504549961 is an apocalyptic number.

It is an amenable number.

7504549961 is a deficient number, since it is larger than the sum of its proper divisors (1).

7504549961 is an equidigital number, since it uses as much as digits as its factorization.

7504549961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 7504549961 is about 86628.8056076038. The cubic root of 7504549961 is about 1957.8295737900.

The spelling of 7504549961 in words is "seven billion, five hundred four million, five hundred forty-nine thousand, nine hundred sixty-one".