7491961568 has 48 divisors (see below), whose sum is σ = 18153606240. Its totient is φ = 2963851776.

The previous prime is 7491961567. The next prime is 7491961577. The reversal of 7491961568 is 8651691947.

It is a super-2 number, since 2×7491961568² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7491961567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283483 + ... + 1289306.

It is an arithmetic number, because the mean of its divisors is an integer number (378200130).

Almost surely, 2^7491961568 is an apocalyptic number.

It is an amenable number.

7491961568 is an abundant number, since it is smaller than the sum of its proper divisors (10661644672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7491961568 is a wasteful number, since it uses less digits than its factorization.

7491961568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572819 (or 2572811 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 56.

The square root of 7491961568 is about 86556.1180275548. The cubic root of 7491961568 is about 1956.7342506535.

The spelling of 7491961568 in words is "seven billion, four hundred ninety-one million, nine hundred sixty-one thousand, five hundred sixty-eight".