6461151540 has 24 divisors (see below), whose sum is σ = 18091224480. Its totient is φ = 1722973728.

The previous prime is 6461151539. The next prime is 6461151547. The reversal of 6461151540 is 451511646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461151547) 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, 53842870 + ... + 53842989.

It is an arithmetic number, because the mean of its divisors is an integer number (753801020).

Almost surely, 2^6461151540 is an apocalyptic number.

6461151540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6461151540 is an abundant number, since it is smaller than the sum of its proper divisors (11630072940).

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

6461151540 is a wasteful number, since it uses less digits than its factorization.

6461151540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107685871 (or 107685869 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 6461151540 is about 80381.2884942758. The cubic root of 6461151540 is about 1862.5301386352.

The spelling of 6461151540 in words is "six billion, four hundred sixty-one million, one hundred fifty-one thousand, five hundred forty".