61021426657400 has 192 divisors, whose sum is σ = 162927219312000. Its totient is φ = 21020604019200.

The previous prime is 61021426657379. The next prime is 61021426657441. The reversal of 61021426657400 is 475662412016.

It is a super-2 number, since 2×61021426657400² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1259785982 + ... + 1259834418.

It is an arithmetic number, because the mean of its divisors is an integer number (848579267250).

Almost surely, 2^{61021426657400} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61021426657400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81463609656000).

61021426657400 is an abundant number, since it is smaller than the sum of its proper divisors (101905792654600).

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

61021426657400 is a wasteful number, since it uses less digits than its factorization.

61021426657400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78622 (or 78613 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 61021426657400 in words is "sixty-one trillion, twenty-one billion, four hundred twenty-six million, six hundred fifty-seven thousand, four hundred".