61254510291 has 48 divisors (see below), whose sum is σ = 97390500480. Its totient is φ = 36863354880.

The previous prime is 61254510287. The next prime is 61254510307. The reversal of 61254510291 is 19201545216.

61254510291 is a `hidden beast` number, since 6 + 1 + 2 + 54 + 510 + 2 + 91 = 666.

61254510291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61254510291 - 2² = 61254510287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61254510991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8184271 + ... + 8191751.

It is an arithmetic number, because the mean of its divisors is an integer number (2028968760).

Almost surely, 2^61254510291 is an apocalyptic number.

61254510291 is a deficient number, since it is larger than the sum of its proper divisors (36135990189).

61254510291 is a wasteful number, since it uses less digits than its factorization.

61254510291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036 (or 9033 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 61254510291 in words is "sixty-one billion, two hundred fifty-four million, five hundred ten thousand, two hundred ninety-one".