61442456751 has 24 divisors (see below), whose sum is σ = 95977103040. Its totient is φ = 37652521536.

The previous prime is 61442456741. The next prime is 61442456753. The reversal of 61442456751 is 15765424416.

61442456751 is a `hidden beast` number, since 6 + 14 + 4 + 24 + 567 + 51 = 666.

It is not a de Polignac number, because 61442456751 - 2¹³ = 61442448559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61442456697 and 61442456706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61442456753) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1070676 + ... + 1126601.

It is an arithmetic number, because the mean of its divisors is an integer number (3999045960).

Almost surely, 2^61442456751 is an apocalyptic number.

61442456751 is a deficient number, since it is larger than the sum of its proper divisors (34534646289).

61442456751 is a wasteful number, since it uses less digits than its factorization.

61442456751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197535 (or 2197532 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 61442456751 in words is "sixty-one billion, four hundred forty-two million, four hundred fifty-six thousand, seven hundred fifty-one".