61294021488 has 160 divisors (see below), whose sum is σ = 209812761600. Its totient is φ = 16751142144.

The previous prime is 61294021483. The next prime is 61294021493. The reversal of 61294021488 is 88412049216.

61294021488 is a `hidden beast` number, since 6 + 129 + 40 + 2 + 1 + 488 = 666.

It is an interprime number because it is at equal distance from previous prime (61294021483) and next prime (61294021493).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61294021483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371083 + ... + 510186.

It is an arithmetic number, because the mean of its divisors is an integer number (1311329760).

Almost surely, 2^61294021488 is an apocalyptic number.

It is an amenable number.

61294021488 is an abundant number, since it is smaller than the sum of its proper divisors (148518740112).

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

61294021488 is a wasteful number, since it uses less digits than its factorization.

61294021488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881316 (or 881304 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 61294021488 in words is "sixty-one billion, two hundred ninety-four million, twenty-one thousand, four hundred eighty-eight".