61253831851 has 8 divisors (see below), whose sum is σ = 62228830064. Its totient is φ = 60282506880.

The previous prime is 61253831827. The next prime is 61253831857. The reversal of 61253831851 is 15813835216.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61253831851 - 2⁵ = 61253831819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61253831798 and 61253831807.

It is not an unprimeable number, because it can be changed into a prime (61253831857) 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, 884685 + ... + 951406.

It is an arithmetic number, because the mean of its divisors is an integer number (7778603758).

Almost surely, 2^61253831851 is an apocalyptic number.

61253831851 is a deficient number, since it is larger than the sum of its proper divisors (974998213).

61253831851 is a wasteful number, since it uses less digits than its factorization.

61253831851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836621.

The product of its digits is 172800, while the sum is 43.

The spelling of 61253831851 in words is "sixty-one billion, two hundred fifty-three million, eight hundred thirty-one thousand, eight hundred fifty-one".